[HackerRank] 2019.05.13-2019.05.19

[HackerRank] Easy

 

A Very Big Sum

• Similar with Simple Array Sum
• Scan the input about how many integers which we will input
• Make the array to put the big number (use the long)
• Put the inputs to the list
  • Because i is the big integer, we should use the %li
• Print out the sum

 

Diagonal Difference

• Scan the input and make the matrix
• Scan the input which should be put inside to matrix
  • Because the matrix has the row and column, we should use the double for loop
• Calculate the first case, which the i and j has the same number
  • wrong in the picture, the row and column should be [0][0],[1][1],[2][2]
• Calculate the second case, in this case, j has the [2][2],[1][1],[0][0]
• use the abs() function to calculate the difference between two summation

 

Plus Minus

• scan the number of input
• the number of positive, negative, zero should be calculated by float
  • use the float
• input the integer to the array
• use the if function to calculate the number of positive, negative, and zero
• use the %f to print out the float