func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m;   int s[505][505];   int main() {     scanf( %d%d , &n, &m);     char c = getchar();     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= m; j++) {         c = getchar();         if (c ==  S )           s[i][j] = 0;         else if (c ==  W )           s[i][j] = 1;         else           s[i][j] = 2;       }       getchar();     }     bool f = 0;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= m; j++) {         if (s[i][j] == 1) {           if (i > 1 && s[i - 1][j] == 0) f = 1;           if (j > 1 && s[i][j - 1] == 0) f = 1;           if (i < n && s[i + 1][j] == 0) f = 1;           if (j < m && s[i][j + 1] == 0) f = 1;         }       }     }     if (f) {       printf( No n );       return 0;     }     printf( Yes n );     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= m; j++) {         if (s[i][j] == 0) {           printf( S );         } else if (s[i][j] == 1)           printf( W );         else           printf( D );       }       printf(  n );     }     return 0;   }   