#include <bits/stdc++.h>

using namespace std;
typedef long long LL;
int n, q, cmd, i, j, K;

int main() {
    cin >> n >> q;
    vector<vector<int> > locker(n + 1);//动态声明大小
    while (q--) {
        cin >> cmd;
        if (cmd == 1) {
            cin >> i >> j >> k;
            if (locker[i].size() < j + 1) locker[i].resize(j + 1);
            locker[i][j] = k;
        } else {
            cin >> i >> j;
            cout << locker[i][j] << endl;
        }
    }
    return 0;
}