三角形
http://acm.hdu.edu.cn/showproblem.php?pid=2039
1 #pragma warning(disable:4996) 2 #include<stdio.h> 3 int main() 4 { 5 int n; 6 double a, b, c; 7 while (scanf("%d", &n) != EOF) 8 { 9 for (int i = 0; i < n; i++) 10 { 11 scanf("%lf%lf%lf", &a, &b, &c); 12 if (a + b > c &&a + c > b && b + c > a ) 13 printf("YES "); 14 else 15 printf("NO "); 16 } 17 } 18 return 0; 19 }