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  1. //Aayush Agarwal - SNAKE
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.     int T, N, X, Y, arr[1001][1001],
  6.         i, j, rowTop, colLeft, rowBottom, colRight, dir, value;
  7.     scanf("%d", &T);
  8.     while(T--) {
  9.         scanf("%d %d %d", &N, &X, &Y); //input
  10.  
  11.         dir = 1; //flag indicating direction for diagonal filling
  12.         value = 1; //counter of value to store in array
  13.  
  14.         //for lower half including principal diagonal
  15.         rowTop = rowBottom = N-1;
  16.         colLeft = colRight = 0;
  17.         for(; rowTop >= 0; rowTop--, colRight++, dir ^= 1)
  18.             if(dir == 0) //fill top to bottom
  19.                 for(i = rowTop, j = colLeft; i <= rowBottom; i++, j++)
  20.                     arr[i][j] = value++;
  21.             else        //fill bottom to top
  22.                 for(i = rowBottom, j = colRight; i >= rowTop; i--, j--)
  23.                     arr[i][j] = value++;
  24.  
  25.         //for upper half
  26.         rowTop = 0;
  27.         rowBottom = N-2;
  28.         colLeft = 1;
  29.         colRight = N-1;
  30.         for(; rowBottom >= 0; rowBottom--, colLeft++, dir ^= 1)
  31.             if(dir == 0)
  32.                 for(i = rowTop, j = colLeft; i <= rowBottom; i++, j++)
  33.                     arr[i][j] = value++;
  34.             else
  35.                 for(i = rowBottom, j = colRight; i >= rowTop; i--, j--)
  36.                     arr[i][j] = value++;
  37.  
  38.         printf("%d\n", arr[X-1][Y-1]); //output
  39.     }
  40.     return 0;
  41. }
Success #stdin #stdout 0s 5852KB
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https://ideone.com/pOY3b3
language:
C (gcc 8.3)
created:
10 years ago
visibility:
secret

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