c program for maximum size square sub-matrix with all 1s

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#include<stdio.h> #define bool int #define R 6 #define C 5 void printMaxSubSquare(bool M[R][C]) {   int i,j;   int S[R][C];   int max_of_s, max_i, max_j;     /* Set first column of S[][]*/   for(i = 0; i < R; i++)      S[i][0] = M[i][0];     /* Set first row of S[][]*/   for(j = 0; j < C; j++)      S[0][j] = M[0][j];         /* Construct other entries of S[][]*/   for(i = 1; i < R; i++)   {     for(j = 1; j < C; j++)     {       if(M[i][j] == 1)         S[i][j] = min(S[i][j-1], S[i-1][j], S[i-1][j-1]) + 1;       else         S[i][j] = 0;     }      }      /* Find the maximum entry, and indexes of maximum entry      in S[][] */   max_of_s = S[0][0]; max_i = 0; max_j = 0;   for(i = 0; i < R; i++)   {     for(j = 0; j < C; j++)     {       if(max_of_s < S[i][j])       {          max_of_s = S[i][j];          max_i = i;          max_j = j;       }            }                   }          printf("\n Maximum size sub-matrix is: \n");   for(i = max_i; i > max_i - max_of_s; i--)   {     for(j = max_j; j > max_j - max_of_s; j--)     {       printf("%d ", M[i][j]);     }      printf("\n");   }  }     /* UTILITY FUNCTIONS */ /* Function to get minimum of three values */ int min(int a, int b, int c) {   int m = a;   if (m > b)     m = b;   if (m > c)     m = c;   return m; } /* Driver function to test above functions */ int main() {   bool M[R][C] =  {{0, 1, 1, 0, 1},                    {1, 1, 0, 1, 0},                    {0, 1, 1, 1, 0},                    {1, 1, 1, 1, 0},                    {1, 1, 1, 1, 1},                    {0, 0, 0, 0, 0}};                   printMaxSubSquare(M);   getchar();  }