#include "bits/stdc++.h"
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n;
cin>>n;
set <pair<int,int>> pary;
for(int i = 1; i<=n;i++){
int d = i*i;
for(int a = 1; a <= i; a++){
for(int b = a; b <= i; b++){
int h = d - (a*a+b*b);
if(h<=0) continue;
int hspr = sqrt(h);
if(hspr*hspr == h) pary.insert(make_pair(max(a,b),min(a,b)));
}
}
}
cout<<pary.size();
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #include "bits/stdc++.h" using namespace std; int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); int n; cin>>n; set <pair<int,int>> pary; for(int i = 1; i<=n;i++){ int d = i*i; for(int a = 1; a <= i; a++){ for(int b = a; b <= i; b++){ int h = d - (a*a+b*b); if(h<=0) continue; int hspr = sqrt(h); if(hspr*hspr == h) pary.insert(make_pair(max(a,b),min(a,b))); } } } cout<<pary.size(); return 0; } |
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