Solution of 1000. A+B Problem ( Timus Online Judge )

#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstring>
using namespace std;
#define pf printf
#define sf scanf
typedef long long ll;


int main()
{
    ll a, b;
    sf("%lld%lld", &a, &b);
    pf("%lld\n", a+b);
}