Submission #1170008

#	Time	Username	Problem	Language	Result	Execution time	Memory
1170008		anteknne	Naan (JOI19_naan)	C++20	0 / 100	0 ms	328 KiB

naan

#include<bits/stdc++.h>
using namespace std;

typedef long double ld;

const int MAXN = 2000;
const int MAXL = 2000;
const ld eps = 0.000000000000001;
int v[MAXN][MAXL];

int a, b;

bool rozw1 (int n, int l) {
    ld suma0 = 0;
    ld suma1 = 0;
    for (int i = 0; i < l; i ++) {
        suma0 += v[0][i];
        suma1 += v[1][i];
    }

    suma0 /= 2.0;
    suma1 /= 2.0;

    ld akt = 0;
    int ind = -1;
    while (ind + 1 < l && ld(v[0][ind + 1]) + akt <= suma0) {
        akt += ld(v[0][ind + 1]);
        ind ++;
    }
    ind ++;

    suma0 *= 2.0;

    ld akt2 = 0;
    for (int i = l - 1; i > ind; i --) {
        akt2 += v[1][i];
    }
    akt2 += (1.0 - ld(suma0 - 2.0 * akt)/ ld(2 * v[0][ind])) * v[1][ind];

    if (akt2 + eps < suma1) {
        return false;
    }

    cout << suma0 - 2.0 * akt + ind * 2 * v[0][ind] << " " << 2 * v[0][ind] << "\n";
    cout << a << " " << b << "\n";
    return true;
}

int main () {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int n, l;
    cin >> n >> l;
    for (int i = 0; i < n; i ++) {
        for (int j = 0; j < l; j ++) {
            cin >> v[i][j];
        }
    }

    if (n == 2) {
        a = 1, b = 2;
        if (!rozw1(n, l)) {
            for (int i = 0; i < l; i ++) {
                swap(v[0][i], v[1][i]);
            }
            swap(a, b);
            if (!rozw1(n, l)) {
                cout << -1 << "\n";
            }
        }

    }



    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 24
• Subtask 3: 0 / 71