Compilare: user.cpp: In function ‘int query(int, int)’: user.cpp:24:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[poz].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:58:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int ii = 0; ii < g[poz].size(); ++ii) ^ user.cpp:31:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("oite.in", "r", stdin); ^ user.cpp:32:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("oite.out", "w", stdout); ^ user.cpp:37:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:39:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^