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- #include<stdio.h>
- int main()
- {
- int a,i,x,y,z,count=0;
- scanf("%d",&a);
- for(i=0;i<a;i++)
- {
- scanf("%d%d%d",&x,&y,&z);
- if(x==1&&y==1||x==1&&z==1||y==1&&z==1)
- {
- count++;
- }
- }
- printf("%d\n",count);
- return 0;
- }
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