C++11 代碼:
#include<iostream>
using namespace std;
int main()
{
int n, flag = 1;
int score = 0;
while(1) {
cin >> n;
if (n == 0) break;
if (n == 1) {
score += 1;
flag = 1;
}
if (n == 2) {
score += flag * 2;
++flag;
}
}
cout << score;
return 0;
}