Submission #19577555

---

Source Code Expand

#include <bits/stdc++.h>

#include <iostream>
#include <vector>
// #include <atcoder/all>
// using namespace atcoder;

using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    string no = "No", yes = "Yes";

    int N;
    cin >> N;
    vector<ll> a(N);
    vector<ll> b(N);
    ll sum_a = 0;
    ll sum_b = 0;
    for (int i = 0; i < N; i++) {
        cin >> a[i];
        sum_a += a[i];
    }
    for (int i = 0; i < N; i++) {
        cin >> b[i];
        sum_b += b[i];
    }
    if (sum_a > sum_b) {
        cout << no << endl;
        return 0;
    }

    ll a_num = 0, b_num = 0;
    for (int i = 0; i < N; i++) {
        if (a[i] > b[i]) {
            b_num += a[i] - b[i];
        } else if (a[i] < b[i]) {
            a_num += (b[i] - a[i] + 1) / 2;
            if (a[i] % 2 != b[i] % 2) {
                b_num++;
            }
        }
    }
    // cout << sum_a << " " << sum_b << endl;
    // cout << a_num << " " << b_num << endl;
    // cout << sum_b - sum_a << endl;
    if (a_num <= sum_b - sum_a && b_num <= sum_b - sum_a)
        // if (a_num + b_num == sum_b - sum_a)
        cout << yes << endl;
    else
        cout << no << endl;

    return 0;
}

Submission Info

Judge Result