Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:11:3: error: ‘cin’ was not declared in this scope cin >> N >> M; ^ user.cpp:16:21: error: ‘a’ was not declared in this scope scanf("%d %d", &a, &b); ^ user.cpp:16:25: error: ‘b’ was not declared in this scope scanf("%d %d", &a, &b); ^ user.cpp:7:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("saracsaurege.in", "r", stdin); ^ user.cpp:8:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("saracsaurege.out", "w", stdout); ^ user.cpp:10:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:13:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^