Compilare: user.cpp: In function ‘int main()’: user.cpp:51:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (time - last < n * n && actQ < querries.size()) ^ user.cpp:54:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < parts.size(); i++) ^ user.cpp:72:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (actQ < querries.size() && querries[actQ].time == time) ^ user.cpp:80:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; actQ < querries.size(); actQ++) ^ user.cpp:82:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < parts.size(); i++) ^ user.cpp:26:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactor.in", "r", stdin); ^ user.cpp:27:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:31:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p->speed); ^ user.cpp:40:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nrQ); ^ user.cpp:43:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &q.sect, &q.time); ^