Compilare: user.cpp: In function ‘int main()’: user.cpp:43:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p.size (); ++i) ^ user.cpp:47:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < q.size (); ++i) ^ user.cpp:52:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p.size (); ++i) ^ user.cpp:53:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int h = 0; h < q.size (); ++h) ^ user.cpp:67:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < p.size (); ++i) ^ user.cpp:68:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < p.size (); ++j) ^ user.cpp:71:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int h = 0; h < q.size (); ++h) ^ user.cpp:22:40: 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:23:42: 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); ^ user.cpp:26:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:31:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d %d", &t, &w, &e, &r); ^