Compilare: user.cpp: In function ‘void sterge(int, int)’: user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[x].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:51:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zlego.in","r",stdin); ^ user.cpp:52:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zlego.out","w",stdout); ^ user.cpp:53:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&t); ^ user.cpp:55:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:58:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&h[i]); ^ user.cpp:60:78: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&f[i]),dp[i] = f[i],G[i].clear(),T[i].clear(),nr[i]=0; ^ user.cpp:43:17: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] dp[j]+=dp[k]; ^ user.cpp:35:10: note: ‘j’ was declared here int i,k,j; ^