#include<stdio.h>
int trangleType(float a, float b, float c)
{
int type;
if ((a + b <= c) || (b + c <= a) || (a + c <= b))
type = -1;
else
{
if (a == b || a == c || b == c)
type = 2;
else
{
if (a == b == c)
type = 1;
}
if ( a*a + b*b == c*c || a*a + c*c == b*b || b*b + c*c == a*a)
type = 3;
else
type = 0;
}
return type;
}
int main()
{
float a, b, c;
scanf("%f, %f, %f", &a, &b, &c);
switch (trangleType(a, b, c))
{
case 0:
printf("一般三角形\n");
break;
case 1:
printf("等边三角形\n");
break;
case 2:
printf("等腰三角形\n");
break;
case 3:
printf("直角三角形\n");
break;
default:
printf("不是三角形\n");
}
}
