Stand on Zanzibar

#include<bits/stdc++.h>
using namespace std;

int n;

int main() {
    cin >> n;
    while (n--) {
        int s = 0;
        int t;
        int p = 1;
        while (cin >> t) {
            if (t == 0) break;
            if (t > p * 2)
                s += t - p*2;
            p = t;
        }
        cout << s << endl;
    }
    
    return 0;
}

Test 1

Verdict: ACCEPTED