Compilare: user.cpp: In function ‘int main()’: user.cpp:55:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < G[i][j].size(); ii++) ^ user.cpp:58:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ii < G[i][j].size()) continue; ^ user.cpp:25:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distractie.in", "r", stdin); ^ user.cpp:26:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distractie.out", "w", stdout); ^ user.cpp:29:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:32:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^