Just A Triangle

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)

Total Submission(s): 2273    Accepted Submission(s): 1503

Problem Description This is an easy problem, just for you to warm up. Give you three edges of a triangle. Can you tell me which kind of triangle it stands for? If it’s a right triangle(直角三角形), please output “good”. If it’s a isosceles triangle(等腰三角形), please output “perfect”. Otherwise, please output “just a triangle”. You may suppose the input is legal.

Input The first line contains an integer t means the number of test cases. The each case contains three integers a, b, c in a line which stands for the length of the three edges. (0 <a, b, c < 300).

Output For each case, output the answer in one line.

Sample Input 4 3 4 5 2 2 3 1 4 4 4 6 3

Sample Output good perfect perfect just a triangle

Source HDU 2009-11 Programming Contest 不用考虑不能构成三角形的情况，所以连判断是不是三角形的条件都不用加。所以简单了。下面上代码。 #include <stdio.h> #include <string.h> int main() { int n,i; scanf("%d",&n); while(n--) { int a,b,c; scanf("%d%d%d",&a,&b,&c); if(a*a==b*b+c*c ||b*b==a*a+c*c || c*c==a*a+b*b) printf("good\n"); else if(a==b ||b==c ||a==c ) printf("perfect\n"); else printf("just a triangle\n"); } return 0; }