#include<stdio.h> int main() { int n; scanf("%d", &n); int scores[3]; int count=0; while(n--){ scanf("%d %d %d", &scores[0], &scores[1], &scores[2]); int avg = (scores[0] + scores[1] + scores[2]) / 3; if (avg < 60) count++; }printf("%d\n",count)...