oj.uz

Submission #432100

# Submission time Handle Problem Language Result Execution time Memory
432100 2021-06-17T20:53:32 Z Dakto XORanges (eJOI19_xoranges) C++17
100 / 100
 774 ms 18704 KB 
#include <bits/stdc++.h>

using namespace std;

struct segtree{
    int n;
    vector<int> v,l,r;
    
    segtree(int na){
        n=1<<int(ceil(log2(na)));
        v.resize(2*n);
        l.resize(2*n);
        r.resize(2*n);
        for(int i=0; i<n; i++) l[i+n]=r[i+n]=i;
        for(int i=n-1; i>0; i--){
            l[i]=l[2*i];
            r[i]=r[2*i+1];
        }
    }

    void set(int i, int val){
        i+=n;
        v[i]=val;
        i/=2;
        while(i){
            v[i]=v[2*i]^v[2*i+1];
            i/=2;
        }
    }

    int query(int left, int right, int u=1){
        if(left>r[u] || right < l[u]) return 0;
        if(left<=l[u] && right >=r[u]) return v[u];
        return query(left,right,2*u)^query(left,right,2*u+1);
    }
};

int main(){
    int n,q;
    cin>>n>>q;
    segtree even(n), odd(n);

    for(int i=0; i<n; i++){
        int t;
        cin>>t;
        if(i%2==0) even.set(i,t);
        else odd.set(i,t);
    }

    for(int i=0; i<q; i++){
        int t;
        cin>>t;
        if(t==1){
            int x,y;
            cin>>x>>y;
            x--;
            if(x%2==0) even.set(x,y);
            else odd.set(x,y);

        }
        else{
            int l,u;
            cin>>l>>u;
            l--;u--;
            if((u-l+1)%2==0){
                cout<<0<<endl;
                continue;
            }
            if(l%2==0) cout<<even.query(l,u)<<endl;
            else cout<<odd.query(l,u)<<endl;
        }
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 288 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 2 ms 304 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 204 KB Output is correct
4 Correct 2 ms 204 KB Output is correct
5 Correct 2 ms 296 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 288 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 304 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 2 ms 204 KB Output is correct
9 Correct 2 ms 204 KB Output is correct
10 Correct 2 ms 296 KB Output is correct
11 Correct 13 ms 716 KB Output is correct
12 Correct 13 ms 716 KB Output is correct
13 Correct 19 ms 716 KB Output is correct
14 Correct 19 ms 788 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 774 ms 18564 KB Output is correct
2 Correct 740 ms 18704 KB Output is correct
3 Correct 736 ms 18620 KB Output is correct
4 Correct 650 ms 18288 KB Output is correct
5 Correct 667 ms 18232 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 288 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 304 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 2 ms 204 KB Output is correct
9 Correct 2 ms 204 KB Output is correct
10 Correct 2 ms 296 KB Output is correct
11 Correct 13 ms 716 KB Output is correct
12 Correct 13 ms 716 KB Output is correct
13 Correct 19 ms 716 KB Output is correct
14 Correct 19 ms 788 KB Output is correct
15 Correct 774 ms 18564 KB Output is correct
16 Correct 740 ms 18704 KB Output is correct
17 Correct 736 ms 18620 KB Output is correct
18 Correct 650 ms 18288 KB Output is correct
19 Correct 667 ms 18232 KB Output is correct
20 Correct 551 ms 18456 KB Output is correct
21 Correct 559 ms 18372 KB Output is correct
22 Correct 556 ms 18468 KB Output is correct
23 Correct 679 ms 18288 KB Output is correct
24 Correct 670 ms 18372 KB Output is correct