Compilare: main.cpp: In function 'int dfs(int)': main.cpp:14:49: warning: no return statement in function returning non-void [-Wreturn-type] dp[nod][1]=dp[nod][1]+min(dp[it][0],dp[it][1]);}} ^ main.cpp: In function 'int main()': main.cpp:16:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("mvc.in","r",stdin); ^ main.cpp:17:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("mvc.out","w",stdout); ^ main.cpp:19:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:21:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ main.cpp:23:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^