题解 | 讨厌鬼购物

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

int main() {
    int a, b, x;
    int n;
    cin >> n ;
    int sum = 0;

    vector<int> ai(n,0), bi(n,0), ci(n,0), di(n,0);
    for (int i = 0; i < n; i++) {
        cin >> ai[i];
        //ai[i] = x;
        //cout << ai[i] << endl;
    }
    for (int i = 0; i < n; i++) {
        cin >> x;
        bi[i] = x;
        //cout << bi[i] << endl;
    }
    for (int i = 0; i < n; i++) {
        cin >> x;
        ci[i] = x;
        //cout << ci[i] << endl;
    }
    for (int i = 0; i < n; i++) {
        cin >> x;
        di[i] = x;
        //cout << di[i] << endl;
    }


    for (int i = 0; i < n; i++) {
        //cout << "c=" << ci[i] << "d=" <<  di[i] << "a=" << ai[i] << "b=" << bi[i] << endl;
        if (ci[i] > di[i] && ai[i] < bi[i]) {
            sum ++;
        }
        if (ci[i] < di[i] && ai[i] > bi[i]) {
            sum ++;
        }
    }

    cout << sum << endl;
}
// 64 位输出请用 printf("%lld")