#include<iostream>
using namespace std;
int main(){
    int num,count =0;
    cin>>num;
    if(num>0||num<100){
        int str[num];
        for(int i =0;i<num;i++){
            cin>>str[i];
            if(str[i]>0){
            count+=str[i];
            }
            cout<<count;
            else{
            cout<<"Invalid Production";
            }
        }
        
    }

        
        
}