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vector插入 - 题解

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

int main()
{
    int n, m, x, y;
    cin >> n;
    vector<int> arr;
    for (int i = 0; i < n; i++)
    {
        cin >> m;
        arr.push_back(m);
    }
    cin >> x >> y;
    arr.insert(arr.begin() + x - 1, y);
    for (auto & ele : arr)
    {
        cout << ele << '\n';
    }
    return 0;
}
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