全RE

#include <bits/stdc++.h>
using namespace std;
long long n,q,a[110000][110000],i,j,k,h;
int main()
{
    scanf("%lld %lld",&q,&n);
    while(n--)
    {
        scanf("%lld",&h);
        if(h==1)
        {
            scanf("%lld %lld %lld",&i,&j,&k);
            a[i][j]=k;
        }
        else if(h==2)
        {
            scanf("%lld %lld",&i,&j);
            printf("%lld\n",a[i][j]);
        }
    }
    return 0;
}