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Submission #978030

# Submission time Handle Problem Language Result Execution time Memory
978030 2024-05-08T17:09:24 Z SeenSiravit XORanges (eJOI19_xoranges) C++14
75 / 100
 103 ms 11060 KB 
#include<bits/stdc++.h>

using namespace std;

const int mxN = 2e5 + 5;

int n;
int a[mxN][2];

int seg[mxN * 2][2];

void build(int l , int r , int node , int t){
    if(l==r){
        seg[node][t] = a[l][t];
        return ;
    }

    int mid = (l + r) / 2;

    build(l , mid , node*2 , t);
    build(mid+1 , r , node*2 + 1 , t);

    seg[node][t] = seg[node*2][t] ^ seg[node*2 + 1][t];
}

void update(int l , int r, int idx, int node , int val , int t){
    if(l>idx || r<idx) return ;

    if(l == r){
        a[idx][t] = val;
        seg[node][t] = val;
        return ;
    }

    int mid = (l+r)/2;

    update(l,mid,idx,node*2,val,t);
    update(mid+1,r,idx,node*2 + 1 ,val,t);

    seg[node][t] = seg[node*2][t] ^ seg[node*2 + 1][t];
}

int query(int l,int r,int curr_l,int curr_r,int node,int t){
    if(curr_l>r || curr_r<l) return 0;
    if(l<=curr_l && curr_r<=r) return seg[node][t];

    int mid = (curr_l + curr_r) / 2;
    
    return query(l,r,curr_l,mid,node*2,t) ^ query(l,r,mid+1,curr_r,node*2 + 1,t);
}

void display(){
    cout<< "\ndisplay\n";
    cout<< 1 << "\n";
    for(int i=1;i<=n;i++) cout<< a[i][1] << " ";
    cout<< "\n";
    for(int i=1;i<=2*n;i++) cout<< seg[i][1] << " ";

    cout<< "\n2\n";
    for(int i=1;i<=n;i++) cout<< a[i][0] << " ";
    cout<< "\n";
    for(int i=1;i<=2*n;i++) cout<< seg[i][0] << " ";
    cout<< "\n";
}

int main(){
    ios::sync_with_stdio(0),cin.tie(0);

    int q;

    cin>> n >> q;

    for(int i=1;i<=n;i++) cin>> a[i][i&1];

    build(1 , n , 1 , 1);
    build(1 , n , 1 , 0);

    // cout<< "before \n";
    // display();

    while(q--){
        int cmd;
        cin>> cmd;

        if(cmd == 1){
            int idx , val;
            cin>> idx >> val;

            update(1,n,idx,1,val,idx&1);

            // display();
        }else{
            int l,r;
            cin>> l >> r;

            int len = r-l+1;

            // cout<< "ans = ";

            if(len%2 == 0){
                cout<< 0 << '\n';
                continue;
            }

            if(len & 1) cout<< query(l,r,1,n,1,l&1) << "\n";
            else cout<< query(l,r,1,n,1,l&1) << "\n";
        }
    }


    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2508 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2508 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 3 ms 2652 KB Output is correct
13 Correct 3 ms 2652 KB Output is correct
14 Correct 3 ms 2524 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 6144 KB Output is correct
2 Correct 103 ms 11032 KB Output is correct
3 Correct 96 ms 11060 KB Output is correct
4 Correct 95 ms 10876 KB Output is correct
5 Correct 87 ms 10596 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2508 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2648 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 3 ms 2652 KB Output is correct
13 Correct 3 ms 2652 KB Output is correct
14 Correct 3 ms 2524 KB Output is correct
15 Correct 100 ms 6144 KB Output is correct
16 Correct 103 ms 11032 KB Output is correct
17 Correct 96 ms 11060 KB Output is correct
18 Correct 95 ms 10876 KB Output is correct
19 Correct 87 ms 10596 KB Output is correct
20 Incorrect 98 ms 10800 KB Output isn't correct
21 Halted 0 ms 0 KB -