Compilare: user.cpp: In function ‘int main()’: user.cpp:169:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < pleaca[i].size(); ++j) { ^ user.cpp:203:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < vine[i].size(); ++j) { ^ user.cpp:88:37: 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:89:39: 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:93:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:95:49: 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:98:42: 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); ^