Compilare: main.cpp: In function 'void solve(int, int, int*, int*, char*)': main.cpp:164:19: warning: suggest parentheses around assignment used as truth value [-Wparentheses] vis[i] = h[i] = 0; ~~~~~^~~ main.cpp: In function 'int main()': main.cpp:177:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("makebipartite.in", "r", stdin); ^ main.cpp:178:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("makebipartite.out", "w", stdout); ^ main.cpp:181:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:184:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:186:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x[i], &y[i]); ^