Compilare: user.cpp: In function ‘int main()’: user.cpp:125:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (!pasageri.empty() && pasageri.size() > locuri) { ^ user.cpp:142:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (!pasageri.empty() && pasageri.size() > locuri) { ^ user.cpp:150:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < pleaca[i].size(); ++j) { ^ user.cpp:153:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pasageri.size() < locuri) { ^ user.cpp:180:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < vine[i].size(); ++j) { ^ user.cpp:76:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trenuri3.in", "r", stdin); ^ user.cpp:77:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trenuri3.out", "w", stdout); ^ user.cpp:81:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:83:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &tren[i].statie, &tren[i].cap); ^ user.cpp:86:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &pas[i].st, &pas[i].dr); ^