Compilare: user.cpp: In function ‘void solve()’: user.cpp:69:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ^ user.cpp:70:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < v.size(); j++) ^ user.cpp:76:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 2; k < o.size(); k++) ^ user.cpp: In function ‘void citire()’: user.cpp:23:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:27:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &t.a.x, &t.a.y, &t.b.x, &t.b.y); ^ user.cpp: In function ‘int main()’: user.cpp:96:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("segmente.in", "r", stdin); ^ user.cpp:97:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("segmente.out", "w", stdout); ^