python/TangDou/AcWing/DoublePointer/800.cpp

#include <bits/stdc++.h>

using namespace std;
const int N = 100010;
int a[N], b[N];

int main() {
    int n, m, x;
    cin >> n >> m >> x;
    //读入a,b两个数组，注意它们两个都是升序的
    for (int i = 0; i < n; i++)cin >> a[i];
    for (int i = 0; i < m; i++)cin >> b[i];
    for (int i = 0, j = m - 1;; i++) {
        while (j > 0 && a[i] + b[j] > x) j--;
        if (a[i] + b[j] == x) {
            cout << i << " " << j << endl;
            break;
        }
    }
    return 0;
}