Compilare: user.cpp: In function ‘void solve(int, int, std::vector<int>)’: user.cpp:32:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<ramase.size(); i++) ^ user.cpp:41:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<ramase.size(); i++) ^ user.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<ramase.size(); i++) ^ user.cpp:71:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<ramase.size(); i++) ^ user.cpp:86:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<ramase.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:115:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.in", "r", stdin); ^ user.cpp:116:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.out", "w", stdout); ^ user.cpp:118:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:121:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].y); ^