Compilare: user.cpp: In function ‘int main()’: user.cpp:24:21: warning: unused variable ‘y’ [-Wunused-variable] int x , y; ^ user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (h[i].size() == edges) ^ user.cpp:49:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (*top > i && h[*top].size() + h[i].size() == edges) ^ user.cpp:13:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("incurcatura.in", "r", stdin); ^ user.cpp:14:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("incurcatura.out", "w", stdout); ^ user.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ user.cpp:17:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:21:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cnt); ^ user.cpp:25:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^