@ -0,0 +1,13 @@
#include<cstdio>
int n,a,b,c,d,e,res;
int main()
{
scanf("%d",&n);
while(n-->0)
scanf("%d%d%d%d%d",&a,&b,&c,&d,&e);
if(a+b+c+d+e<20) res++;
}
printf("%d\n",res);
return 0;
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