Statistics

Problem Statement for "ProgressBar"

Problem Statement

Installation programs often run several tasks, one after another. Each task is assigned an integer, the expected execution time of this task. During the installation, a progress bar shows the user what percentage of the installation time has elapsed. In this problem, the bar will be represented by a string containing exactly 20 characters. If X% of the installation has been completed, then the leftmost X% of these characters should be a '#', while the remaining characters should be '.'. If necessary, round down the number of '#' characters to the nearest integer less than or equal to the actual value (see example 0). The bar starts at 0% and is only updated each time a task finishes execution.

Create a class ProgressBar containing the method showProgress which takes a int[] taskTimes, the expected execution time for each task in the order they are run, and an int tasksCompleted, the number of these tasks that have been completed. The method should return a String containing exactly 20 characters showing the progress bar according to the descriptions above.

Definition

Class:
ProgressBar
Method:
showProgress
Parameters:
int[], int
Returns:
String
Method signature:
String showProgress(int[] taskTimes, int tasksCompleted)
(be sure your method is public)

Constraints

  • taskTimes will contain between 1 and 50 elements, inclusive.
  • Each element in taskTimes will be between 1 and 1000, inclusive.
  • tasksCompleted will be between 0 and the number of elements in taskTimes, inclusive.

Examples

  1. {19,6,23,17}

    3

    Returns: "##############......"

    This installation consist of 4 tasks, and the expected execution times for these are 19, 6, 23 and 17, respectively. Since the first 3 tasks have been completed, the total execution time for the installation so far has been 19+6+23 = 48 and the total expected time is 19+6+23+17 = 65. Thus 48/65 = 73.84615% of the installation has been completed, so the first 20*0.7384615 = 14.76923 = 14 (round down) characters in the string should be '#', and the remaining 6 should be '.'. Thus the method returns "##############......"

  2. {2,3,7,1,4,3}

    4

    Returns: "#############......."

    The installation has run for 2+3+7+1 = 13 units and the total execution is 2+3+7+1+4+3 = 20.

  3. {553,846,816,203,101,120,161,818,315,772}

    4

    Returns: "##########.........."

  4. {7,60,468,489,707,499,350,998,1000,716,457,104,597,583,396,862}

    2

    Returns: "...................."

  5. {419,337,853,513,632,861,336,594,94,367,336,297,966,627,399,433,846,859,80,2}

    19

    Returns: "###################."

    Even though about 99.98% of the installation has been completed, the last character should still be a '.' since we always round down.

  6. {500}

    0

    Returns: "...................."

  7. {500}

    1

    Returns: "####################"

  8. {878,766,805,362}

    2

    Returns: "###########........."

  9. {199,921,25,245,696,596,289,503,139,560,163,929,435,607,882,808,774,968,576,112,509,387,456,85,285,487,453,953,856,221,314,90,536}

    9

    Returns: "####................"

  10. {408,396}

    1

    Returns: "##########.........."

  11. {886,457,649,949,630,882,17,209,307,108,867,473,902,841,424,160,621,123,985,36}

    16

    Returns: "################...."

  12. {87,515,621,634,896,567,265,79,558,577,846,927,471}

    0

    Returns: "...................."

  13. {377,817,295,239,890,60,424,88,427,68,424,309,8,966,729}

    14

    Returns: "#################..."

  14. {332,865,914,885,473,63,853,1000,133,497,789,540,22,841,211,336,507,759,614,997,990,568,107,432,937,469,90,813,114,106,987,615,135,336,823,123,708}

    4

    Returns: "##.................."

  15. {341,810,131,1000,659,974,383,272,734,874,198,392,917,625,767,996,221,644,172,665,382,676,195,86,706,295,489,712,996,968,583,939,40,956,997,521,167,465}

    19

    Returns: "##########.........."

  16. {130,721,994,883,576,629,615,546,735,726,32,71,970,949,690,128,808,231,262,598,511,786,348,854,981,995,437,86,176,922,117,201,614,426,944,43,927,89,508,988,638,189,423,703,6,782,884,152}

    25

    Returns: "###########........."

  17. {948,38,627,755,233,264,898,8,787,667,615,553,98,406,72,44,290,763,88,441,162,538,958,950,803,733,975,608,415,921,62,724,408}

    17

    Returns: "########............"

  18. {553,846,816,503,101,120,161,818,315,772}

    9

    Returns: "################...."

  19. {602,901,638,93,590,473,669,461,952,778,779,730,946,530,292,983,928,826,887}

    19

    Returns: "####################"

  20. {649,532,748,318,299,170,577,468,956,439,23,65,500,877,739,729,379,439,745,729,990,915,50,647,980}

    24

    Returns: "##################.."

  21. {964,550,841,395,685,983,815,276,668,146,261,494,37,776,321,101,815,98}

    5

    Returns: "#######............."

  22. {812,632,21,744,977,941,494,603,423,4,657,116,429,800,634,812,134,972,301,489}

    20

    Returns: "####################"

  23. {214,115,50,283,61,430,312,914,108,97,209,732,875,70,653,138,435,959,376,476,311,928,705,476,447,455,533,894,348,496,970,602,627,850,891}

    17

    Returns: "######.............."

  24. {132,61,119,126,616,860,997,99,549,395,190,332,997,985,226,290,825,166,489,101,252,269,759,747,784,994,228,368,805,888,864,502,973,578,593}

    6

    Returns: "##.................."

  25. {975,763,761,118,36,253,351,714,308,580,383,554,224,485,737,315,908,271,550,824,833}

    19

    Returns: "################...."

  26. {127,603,44,620,566,827,103,171,896,873,165,85,594,113,855,504,550,110,299}

    3

    Returns: "#..................."

  27. {706,165,679,36,704,506,567,727,781,385,683,968,986,792,171,785,512,931,335,875,82,667,21,487,299,207,549,274,515,384}

    19

    Returns: "##############......"

  28. {1,4,852,451,855,608,519,221,822,44,926,169,485,488,556,950,781,598,821,358,783,218,186,860,269,701,461,626,192,45,924,192,312,798,655,184,395,933,232,790,421,254,684,800,233,161}

    33

    Returns: "##############......"

  29. {23,309,823,38,812,689,190,761,917,525,753,591,298,551,842,982,400,160,756,976,73,795,419,587,350,367,122,698,725,44,364,676,983,933,219,991,648,282,324}

    13

    Returns: "######.............."

  30. {571,149,361,508,319,906,935,429,737}

    9

    Returns: "####################"

  31. {492,824,897,946,836,560,412,925,728,806,900,746,708,152,117,660,314,955,740,495,490,483,766,441,292,493,443,735,144,329,636,139,513,323,522,318,249,347,227,247,609}

    21

    Returns: "############........"

  32. {695,734,398,544,881,813,140,955,574,480,587,357,359,816,158,517,609,981,898,493,572,435,493,736,53,382,739}

    19

    Returns: "##############......"

  33. {45,81,216,400,968,40,700,435,604,977,971,368,151,416,875,385,576,319,533,107,744,775,254,515,162,452,458,815,294,202,994,933,37,2,100,923,26}

    26

    Returns: "##############......"

  34. {924,882,441,255,34,552,105,867,960,328,987,489,873,620,260,338,945,727,244,832,20,322,258,288,123,707,452,73,480,483,311,822,618,680,443,265,261}

    29

    Returns: "###############....."

  35. {803,428,476,492,319,152,537}

    2

    Returns: "#######............."

  36. {781,70,642,686,432,294,221,820,185,74,927,871,319,928,149,225,453,903,384,465,412,614,258,37,959,24,231,617,458,406,761,413,901,348,541,447,267,168}

    2

    Returns: "...................."

  37. {256,193,202,914,899,315,44,876,595,310,576,508,126,193,185,957}

    16

    Returns: "####################"

  38. {720,92,470,600,78,851,135,352,169,432,638,415,257,356,756,387,621,416,188,801,984,624,82,400,260,558,568,177,534,262,645,642,35,918}

    15

    Returns: "########............"

  39. {472,729,515,360,297,86,652,695,887,531,574,320,790,592,720,706,929,725,890,349,676,148,450,752,781,736,548,951,314,165,102,741,28,304,994,786,929,429,57,577,871,813,707,242,625,654}

    17

    Returns: "#######............."

  40. {582,975,822,994,413,602,105,812,361,191,52,803,322,828,769,509,674,673,987,348,420,54,169,655,999,875,3,230,63,546,284,298,743}

    32

    Returns: "###################."

  41. {453,871,908,420,108,720,430,822,471,279,296,832,638,142,524,192,287,94,844,997,811,253,676,380,874,702,726,126,85,318,587,643,617,695,444,941,574,468}

    24

    Returns: "############........"

  42. {141,303,80,406,183,128,592,885,254,998,594,465,270,859,533,925,30,863}

    10

    Returns: "#########..........."

  43. {894,250,342,664,682,670,656,425,459,462,58,404,629,562,123,674,418,858,327,369,790,935,612,781,4,359,942,800,314,995,843,116,365,714,956,330,44,747,317,461,835,718,150,638,538,325,323,370}

    7

    Returns: "###................."

  44. {401,301,312,12,904,869,499,407,862,64,381,55,288,619,184,748,48,333,718,954,940,668,482,896,595,71,994,862,910,24,463,915,829,359,132,822,120,860,763,299,839,179,479,46,926,501,720,802,585,596}

    19

    Returns: "######.............."

  45. {647,374,463,411}

    3

    Returns: "###############....."

  46. {172,250,21,944,235,869,115,665,327,402,222,208,893,295,629,505,580,396,259,338,890,507,553,644,797,58,848,693,348,251,916,628,195,89,92,558,778,735,43,787}

    15

    Returns: "######.............."

  47. {484,442,388,168,405,475,543,102,93,377,38,300,319,191,731,184,367,517,423,528,634,325,463,570,345,300,208,402,446,795,93,909,166,544,473,63,900,833,776,911,116}

    32

    Returns: "##############......"

  48. {522,387,680,102,913,702,653,109,2,129,672}

    8

    Returns: "################...."

  49. {360,686,553,485,689,78,49,764,845,488,832,317,216,747,405,76,29,928,882,399,903,696,878,395,538,189,654,748,875,687,867,948,171,583,464,952,347,343,974,946,465,840,54,981,493,329,858}

    22

    Returns: "########............"

  50. {405,275,385,592,437,845,398,415,827,986}

    4

    Returns: "#####..............."

  51. {103,691,764,624,74,410,11,37,441,835,223,937,315,666,89,907,782,263,655,134,657,379,524,18,891,948,989}

    19

    Returns: "#############......."

  52. {249,678,137,266,787,87,499,713,626,127,870,99,322,88,555,993,857,137,973,224,831,461,502,614,717,692,855,170,883,272,465,123,846,464,38,315,999,34,347,986,913,368,356,416}

    21

    Returns: "#########..........."

  53. {588,665,826,511,135,268,769,506,355,314,101,515,909,43,640}

    7

    Returns: "##########.........."

  54. { 19, 6, 23, 17 }

    3

    Returns: "##############......"

  55. { 47, 43 }

    1

    Returns: "##########.........."

  56. { 419, 337, 853, 513, 632, 861, 336, 594, 94, 367, 336, 297, 966, 627, 399, 433, 846, 859, 80, 2 }

    19

    Returns: "###################."

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