oj.uz

답안 #819811

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
819811 2023-08-10T13:47:43 Z Andrijanikolic73 XORanges (eJOI19_xoranges) C++17
30 / 100
 1000 ms 1876 KB 
#include <bits/stdc++.h>
#define pb push_back
#define ll long long
#define int long long
using namespace std;
const int N=2e5+50;
const int inf=1e18;
const int mod=1e9+7;
int a[N];
int n;
int q;
struct segtree{
    int t[4*N]={0};
    void build(int v,int tl,int tr){
        if(tl==tr)t[v]=a[tl];
        else {
            int tm=(tl+tr)/2;
            build(v*2,tl,tm);
            build(v*2+1,tm+1,tr);
            t[v]=(t[v*2]^t[v*2+1]);
        }
    }
    int query(int v,int tl,int tr,int l,int r){
        if(tr<l||tl>r)return 0;
        if(l<=tl&&tr<=r)return t[v];
        int tm=(tl+tr)/2;
        return (query(v*2,tl,tm,l,r)^query(v*2+1,tm+1,tr,l,r));
    }
    void update(int v,int tl,int tr,int index,int value){
        if(tl==tr){
            t[v]=value;
        }
        else {
            int tm=(tl+tr)/2;
            if(index<=tm){
                update(v*2,tl,tm,index,value);
            }
            else {
                update(v*2+1,tm+1,tr,index,value);
            }
            t[v]=(t[v*2]^t[v*2+1]);
        }
    }
};
segtree seg;
int brute(int l,int r){
    int ans=0;
            for(int i=l;i<=r;i++){
                for(int j=i;j<=r;j++){
                    ans^=seg.query(1,1,n,i,j);
                }
            }
            return ans;
}
int solve(int l,int r,int o){
    if((r-l+1)%2==0)return 0;
    if(l==r)return a[l];
    int ans=0;
    for(int i=l;i<=r;i++){
        for(int j=i;j<=r;j++){
            if(j%2==o%2)ans^=a[j];
        }
    }
    return ans;
}
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>q;
    for(int i=1;i<=n;i++)cin>>a[i];
    while(q--){
        int o;
        cin>>o;
        if(o==1){
            int i,x;
            cin>>i>>x;
            a[i]=x;
        }
        else {
            int l,r;
            cin>>l>>r;
            cout<<solve(l,r,l%2);
            cout<<endl;
        }
    }
}

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 340 KB Output is correct
2 Correct 5 ms 340 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 24 ms 340 KB Output is correct
5 Correct 22 ms 340 KB Output is correct

Subtask #3
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 6 ms 340 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 7 ms 340 KB Output is correct
9 Correct 24 ms 340 KB Output is correct
10 Correct 22 ms 340 KB Output is correct
11 Execution timed out 1058 ms 480 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1073 ms 1876 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 6 ms 340 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 7 ms 340 KB Output is correct
9 Correct 24 ms 340 KB Output is correct
10 Correct 22 ms 340 KB Output is correct
11 Execution timed out 1058 ms 480 KB Time limit exceeded
12 Halted 0 ms 0 KB -