zoj 1495 Stacking Tower

#include <iostream>using namespace std;int n, wid;int a[100];int main(){while (cin >> n && n){int i;for (i = 0; i < n; ++i) cin >> a[i];wid = n;i = 0;while (1){if (a[i] > wid){++i;--wid;}else wid = a[i++] - 1;if (wid == 0) break;}cout << n - i << endl;}return 0;}