Compilare: user.cpp: In function ‘bool cuplare(int)’: user.cpp:82:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int ii = 0; ii < a[v].size(); ii++) ^ user.cpp:88:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int ii = 0; ii < a[v].size(); ii++) ^ user.cpp: In function ‘int main()’: user.cpp:41:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in", "r", stdin); ^ user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out", "w", stdout); ^ user.cpp:44:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &la, &lb, &m); ^ user.cpp:46:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^