#include <stdio.h> int main() { int math = 0;//初始化 int chinese = 0; int english = 0; scanf("%d %d %d", &math, &chinese, &english);//输入成绩 int average = (math + chinese + english) / 3;//平均成绩 if (average >= 60)//判断 { printf("NO\n"); } else { printf("YES\n"); } return 0; }