#include<stdio.h>
int main(){
int x=0,i,y,b=0,c=0,d=0,e=0,f=0,g=0;
int a[1000];
y=300;
e=300;
for(i=0;i<12;i++){
scanf("%d",&a[i]);
}
for(i=0;i<12;i++){
x=e-a[i];
if(x>=100){
c=c+(x/100)*100;
b=x%100;
e=y+b;
}
else if(x>0&&x<100){
b=x;
e=y+b;
}
else if(x<0){
f=i+1;
printf("-%d",f);
break;
}
if(i==11&&x>=0){
g=c+c*0.2;
d=g+b;
printf("%d",d);
}

}
return 0;
}