Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:17:37: 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:48:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (register int j = 0; j < g[i].size(); ++j) ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.in", "r", stdin); ^ user.cpp:32:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.out", "w", stdout); ^ user.cpp:35:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:38:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ user.cpp:41:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &t, &x); ^