题解如下【三角形的两条边必须大于第三边】

#include<iostream>
using namespace std;
int main()
{
int a,b,c,x,y,z;
cin >> a >> b >> c;
x = a + b;
y = a + c;
z = b + c;
if(x > c && y > b && z > a){
cout << "yes";
} else {
cout << "no";
}
return 0;
}