#include <bits/stdc++.h> using namespace std; int main() { int h,jj=0,mm=0; for(int i = 1;i<=12;i++) { cin >>h; jj+=300; if(jj<h) { cout <<-i; return 0; } jj-=h; mm+=jj/100; jj=jj%100; } cout <<mm*100+jj; return 0; }