func_code_string: #include <bits/stdc++.h>   int main() {     int c, input[100010];     int i = -1, j, k;     while ((c = getchar()) !=   n ) {       if (i < 0 || input[i] != c)         input[++i] = c;       else         i--;     }     if (i < 0)       printf( Yes n );     else       printf( No n );     return 0;   }   