Cod sursa(job #2984541)

Utilizator Zed1YasuoAlex Birsan Zed1Yasuo Data 24 februarie 2023 13:51:42
Problema Dreptunghiuri Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.72 kb
#include <fstream>
#include <cmath>
using namespace std;
ifstream f("dreptunghiuri.in");
ofstream g("dreptunghiuri.out");
int n,m,cnt,rad[405*405];
long long sol;
int main()
{
    f>>n>>m;
    int r=max(n,m);
    for(int i=1;i*i<=r;i++)
        rad[i*i]=i;
    for(int i=1;i<n;i++)
        for(int j=1;j<m;j++)
        {
            int nr=1;
            for(int t=1;t<i;t++)
            {
                //b^2-4ac
                int C=j*j-4*t*(i-t);
                if(C==0&&j%2==0)
                    nr++;
                else
                if(C>0&&!rad[C]&&(j+rad[C])%2==0&&j>rad[C])
                    nr+=2;
            }
            sol+=(nr*(n-i)*(m-j));
        }
    g<<sol;
    return 0;
}