#include <bits/stdc++.h> using namespace std; int main() { int a,b,c,d; cin>>a>>b>>c>>d; cout<<" "<<a+b+c+d<<endl; return 0; }$$

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d;
    cin >> a >> b >> c >> d ;
    cout<<a+b+c+d;
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d;
    cin >> a >> b >> c >> d ;
    cout<<a+b+c+d;
    return 0;
}

#include<iostream>
using namespace std;
int main(){
    int a,b,c,d;
    while(true){
        cin>>a>>b>>c>>d;
        if(a>=0&&a<=100&&
           b>=0&&b<=100&&
           c>=0&&c<=100&&
           d>=0&&d<=100){
            break;
        }else{
            cout<<"输入的分数格式不对重新输入"<<endl;
        }
    }
    cout<<a+b+c+d;
    return 0;
}