Compilare: user.cpp: In function ‘int main()’: user.cpp:104:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < segm[j].size (); ++i) ^ user.cpp:129:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j < 0 || j >= segm[i].size ()) continue; ^ user.cpp:75:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("poligon.in", "r", stdin); ^ user.cpp:76:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("poligon.out", "w", stdout); ^ user.cpp:78:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &n, &m); ^ user.cpp:82:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] sor[i] = v[i]; ^ user.cpp:117:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &a, &b); ^