Compilare: user.cpp: In function ‘int main()’: user.cpp:55:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < rcol.size (); ++i) ^ user.cpp:59:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < rlin.size (); ++i) ^ user.cpp:63:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < lin[i].size (); ++j) ^ user.cpp: In function ‘int bin(int, std::vector<int>)’: user.cpp:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:29:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cabana2.in", "r", stdin); ^ user.cpp:30:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cabana2.out", "w", stdout); ^ user.cpp:33:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:37:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &v[i].f, &v[i].s); ^