Compilare: user.cpp: In function ‘void prepare()’: user.cpp:75:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < xes.size()-1; i++) { ^ user.cpp: In function ‘void solve()’: user.cpp:102:16: warning: statement has no effect [-Wunused-value] for (cs; cs < xes.size(); cs <<= 1); ^ user.cpp:102:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (cs; cs < xes.size(); cs <<= 1); ^ user.cpp: In function ‘void citire()’: user.cpp:48:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:50:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &polygon[i].x, &polygon[i].y); ^ user.cpp:52:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &infra[i].x, &infra[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:121:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poligon.in", "r", stdin); ^ user.cpp:122:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poligon.out", "w", stdout); ^