Nine degree cin/cout time consuming reason __cin

Do nine degrees, due to the large amount of data, in many cases, using scanf and printf in place of CIN and cout for input and output, or the error timeout can not AC.

There are three suggestions for increasing the input/output speed of C + +: At the the the the the the the the the the the the the I in main Function,add:std::ios_base::sync_with_stdio (false) which cancel Thesynchronization between <iostream> and <cstdio>; At the second line in main Function,add:std::cin.tie (0). Which leads to, CIN ties nothing.cin, ties cout at a. For the Endl, use ' \ n ' or ' \ n ' instead.

#include <algorithm>  
#include <cstring>  
using namespace std;  
int main ()  
{  
    Std::ios::sync_with_stdio (false);  
    Cin.tie (0);  
    int n,m;  
    cin>>n>>m;  
    cout<<n<< "" <<m<< "\ n";  
    return 0;  
}