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- #include<bits/stdc++.h>
- using namespace std;
- int main() {
- int a, b, c;
- cin >> a >> b >> c;
- if(a + c <= b || a + b <= c || c + b <= a) {
- cout << "not a triangle" << endl;
- } else if(a * a + c * c == b * b || a * a + b * b == c * c || b * b + c * c == a * a) {
- cout << "yes" << endl;
- } else {
- cout << "no" << endl;
- }
- return 0;
- }
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