oj.uz

Submission #448279

# Submission time Handle Problem Language Result Execution time Memory
448279 2021-07-29T13:16:51 Z mychecksedad XORanges (eJOI19_xoranges) C++17
0 / 100
 39 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
const int N = 210;
 
int n, q, arr[N], qt, t1[5*N], t2[5*N], len;
 
void init(int l, int r, int k){
    if(l==r){
        t1[k]=t2[k]=0;
        if(l&1) t1[k]=arr[l];
        else t2[k]=arr[l];
        return;
    }
    int mid = (l+r)/2;
    init(l, mid, 2*k);
    init(mid+1, r, 2*k+1);
    t1[k] = t1[2*k]^t1[2*k+1];
    t2[k] = t2[2*k]^t2[2*k+1];
}
void update(int l, int r, int p, int val, int k){
    if(l > p || r < p) return;
    if(l == r){
        if(l&1) t1[k] = val;
        else t2[k] = val;
        return;
    }int mid = (l+r)/2;
    update(l, mid, p, val, 2*k);
    update(mid+1, r, p, val, 2*k+1);
    t1[k] = t1[2*k]^t1[2*k+1];
    t2[k] = t2[2*k]^t2[2*k+1];
}
int ans(int l, int r, int ql, int qr, int k){
    if(l > qr || r < ql) return 0;
    if(l <= ql && r <= qr){
        return (ql & 1 ? t1[k] : t2[k]);
    }
    int mid = (l+r)/2;
    return ans(l, mid, ql, qr, 2*k) ^ ans(mid+1, r, ql, qr, 2*k+1);
}
int main(){
   
    cin >> n >> q;
    for(int i = 1; i <= n; i++) cin >> arr[i];
    init(1, n, 1);
    while(q--){
        int l, r;
        cin >> qt >> l >> r;
        if(qt == 1){
            update(1, n, l, r, 1);
        }
        else
            cout << ans(1, n, l, r, 1) << '\n';
        
    }
 
 
 
 
    return 0;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 39 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 304 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 39 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 332 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 39 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -