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Submission #469506

# Submission time Handle Problem Language Result Execution time Memory
469506 2021-09-01T08:17:44 Z FatihSolak XORanges (eJOI19_xoranges) C++17
100 / 100
 217 ms 11888 KB 
#include <bits/stdc++.h>
#define N 200005
#define int long long
using namespace std;
int t[4*N][2];
int arr[N];
void upd(int v,int tl,int tr,int pos,int val){
    if(tl == tr){
        t[v][pos%2] = val;
    }
    else{
        int tm = (tl+tr)/2;
        if(pos <= tm)
            upd(v*2,tl,tm,pos,val);
        else upd(v*2+1,tm+1,tr,pos,val);
        t[v][0] = t[v*2][0] ^ t[v*2+1][0];
        t[v][1] = t[v*2][1] ^ t[v*2+1][1];
    }
}
int get(int v,int tl,int tr,int l,int r,int idx){
    if(tr < l || r <tl){
        return 0;
    }
    if(l <= tl && tr <= r){
        return t[v][idx];
    }
    int tm = (tl+tr)/2;
    return get(v*2,tl,tm,l,r,idx)^get(v*2+1,tm+1,tr,l,r,idx);
}
void solve(){
    int n,q;
    cin >> n >> q;
    for(int i=1;i<=n;i++){
        cin >> arr[i];
        upd(1,1,n,i,arr[i]);
    }
    while(q--){
        int type;
        cin >> type;
        if(type == 1){
            int pos,val;
            cin >> pos >> val;
            upd(1,1,n,pos,val);
        }
        if(type == 2){
            int l,r;
            cin >> l >> r;
            if((r-l)%2){
                cout << 0 << "\n";
                continue;
            }
            cout << get(1,1,n,l,r,l%2) << "\n";
        }
    }
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 328 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 4 ms 588 KB Output is correct
12 Correct 4 ms 588 KB Output is correct
13 Correct 4 ms 588 KB Output is correct
14 Correct 4 ms 588 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 217 ms 11888 KB Output is correct
2 Correct 210 ms 11420 KB Output is correct
3 Correct 206 ms 11416 KB Output is correct
4 Correct 179 ms 11428 KB Output is correct
5 Correct 179 ms 11436 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 4 ms 588 KB Output is correct
12 Correct 4 ms 588 KB Output is correct
13 Correct 4 ms 588 KB Output is correct
14 Correct 4 ms 588 KB Output is correct
15 Correct 217 ms 11888 KB Output is correct
16 Correct 210 ms 11420 KB Output is correct
17 Correct 206 ms 11416 KB Output is correct
18 Correct 179 ms 11428 KB Output is correct
19 Correct 179 ms 11436 KB Output is correct
20 Correct 204 ms 11184 KB Output is correct
21 Correct 202 ms 11012 KB Output is correct
22 Correct 195 ms 11000 KB Output is correct
23 Correct 180 ms 11384 KB Output is correct
24 Correct 180 ms 11380 KB Output is correct