Compilare: user.cpp: In function ‘int main()’: user.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<=b[j])q++,x=x*1LL*2; ^ user.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(mx<x)break; ^ user.cpp:11:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cocochanel.in","r",stdin); ^ user.cpp:12:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cocochanel.out","w",stdout); ^ user.cpp:13:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:14:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++)scanf("%d",&a[i]); ^ user.cpp:15:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++)scanf("%d",&b[i]),mx=max(mx,b[i]); ^