func_code_string: #include <bits/stdc++.h>   const int N = 100010;   const int M = 30;   std::map<std::string, int> Hash;   int fa[N << 1], n, m, q;   char s[M];   int find(int u) { return fa[u] == u ? u : fa[u] = find(fa[u]); }   void unite(int u, int v) {     int _u = find(u), _v = find(v);     fa[_u] = _v;     find(u);   }   int main() {     for (int i = 0; i < N << 1; ++i) {       fa[i] = i;     }     scanf( %d%d%d , &n, &m, &q);     for (int i = 0; i < n; ++i) {       scanf( %s , s);       std::string str = s;       Hash[str] = i;     }     for (int i = 0, type; i < m; ++i) {       scanf( %d%s , &type, s);       std::string str = s;       int u = Hash[str];       scanf( %s , s);       str = s;       int v = Hash[str];       find(u), find(v), find(v + n), find(u + n);       if (type == 1) {         if (fa[u] == fa[v + n] || fa[v] == fa[u + n]) {           printf( NO n );           continue;         }         printf( YES n );         unite(u, v);         unite(u + n, v + n);         continue;       }       if (type == 2) {         if (fa[u] == fa[v] || fa[u + n] == fa[v + n]) {           printf( NO n );           continue;         }         printf( YES n );         unite(u, v + n);         unite(u + n, v);       }     }     for (int i = 0; i < q; ++i) {       scanf( %s , s);       std::string str = s;       int u = Hash[str];       scanf( %s , s);       str = s;       int v = Hash[str];       find(u), find(v), find(u + n), find(v + n);       if (fa[u] == fa[v] || fa[u + n] == fa[v + n]) {         printf( 1 n );       } else if (fa[u] == fa[v + n] || fa[u + n] == fa[v]) {         printf( 2 n );       } else {         printf( 3 n );       }     }     return 0;   }   