#include <iostream>
using namespace std;
int main() {
int n,k,st=0; bool wd=false;
cin>>n; n=n*3;
int t[n];
for (int i = 0; i<n; i++){
cin>>t[i];
if ((t[i]<0)||(cin.peek()=='\n')) {wd=true; break;}
else {if (i<=n) {st+=t[i];}}
k+=1;
}
if ((wd==false)&&(k==n)) {cout<<"Общее время обработки всех деталей = "<<st;}
else {cout<<"Ошибка";}
}
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