#include <stdio.h> int main () { int a,b,c; scanf("%d %d %d",&a,&b,&c); int x=a+b+c; if(x/3>=60){ printf("NO"); }else{ printf("YES"); } return 0; }
#include <stdio.h> int main () { int a,b,c; scanf("%d %d %d",&a,&b,&c); int x=a+b+c; if(x/3>=60){ printf("NO"); }else{ printf("YES"); } return 0; }