#include <iostream> using namespace std; int main() { int i,sum1=0; int a[15]; double sum2=0; for(i=1;i<=12;i++) cin>>a[i]; for(i=1;i<=12;i++) { sum1+=300; if(sum1<a[i]) { cout<<-i; break; } sum1-=a[i]; if(sum1>100) { sum2+=sum1/100*100; sum1=sum1%100; } } if(i==13) cout<<sum2*1.2+sum1; return 0; }