Compilare: user.cpp: In function ‘int query(int)’: user.cpp:16:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gm[poz].size(); ++i) ^ user.cpp:23:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < gp[poz].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:48:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.in", "r", stdin); ^ user.cpp:49:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.out", "w", stdout); ^ user.cpp:53:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^