Cod sursa(job #601958)

Utilizator dushmiMihai-Alexandru Dusmanu dushmi Data 8 iulie 2011 16:09:13
Problema Dreptunghiuri Scor 60
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.24 kb
#include <cstdio>
#include <cmath>

int n, m;

void solve() {
    long long rez = 0;

    int a, b, c, delta, v, s;

    double rad;

    for (int i = 1; i <= n; ++ i)
        for (int j = 1; j <= m; ++ j) {
            v = 1;

            for (int k = 1; k < j; ++ k ) {
                a = 1;
                b = - i;
                c = k * (j - k);

                delta = b * b - 4 * a * c;

                rad = (double)sqrt(delta);

                if (delta >= 0 && rad * rad == (int)rad * (int)rad) {
                    s = - b - (int)rad;

                    if (s % (2 * a) == 0 && 1 <= s / (2 * a) && s / (2 * a) < i)
                        ++ v;

                    if (delta > 0) {
                        s = - b + (int)rad;

                        if (s % (2 * a) == 0 && 1 <= s / (2 * a) && s / (2 * a) < i)
                            ++ v;
                    }
                }
            }

            rez += (long long)(n - i + 1) * (m - j + 1) * v;
        }

    printf("%lld", rez);
}

int main() {
    freopen("dreptunghiuri.in", "r", stdin);
    freopen("dreptunghiuri.out", "w", stdout);

    scanf("%d%d", &n, &m);

    -- n;
    -- m;

    solve();

    return 0;
}