oj.uz

Submission #839311

# Submission time Handle Problem Language Result Execution time Memory
839311 2023-08-29T16:06:59 Z raul2008487 XORanges (eJOI19_xoranges) C++17
55 / 100
 400 ms 7520 KB 
#include <bits/stdc++.h>
#define pb push_back
#define eb emplace_back
#define in insert
#define ld long double
#define ll long long
#define pii pair<ll,ll>
#define vl vector<ll>
#define mpr make_pair
#define fi first
#define se second
#define lg(a) __lg(a)
#define all(v) v.begin(),v.end()
//#define endl "\n"
using namespace std;
const int sz = 2e5+5;
const ll inf = 100000000000000005;
ll id[sz], a[sz], tree[sz];
void build(ll v, ll l, ll r){
    if(l==r){
        tree[v] = a[l];
        return ;
    }
    ll m = (l+r)>>1;
    build(v*2,l,m);
    build(v*2+1,m+1,r);
    tree[v] = (tree[v*2] ^ tree[v*2+1]);
}
void update(ll v, ll tl, ll tr, ll pos, ll val){
    if(tl > tr){return ;}
    if(tl == tr && tr == pos){
        tree[v] = val;
        a[tl] = val;
        return ;
    }
    ll tm = (tl+tr)>>1;
    if(pos <= tm){
        update(v*2,tl,tm,pos,val);
    }
    else{
        update(v*2+1,tm+1,tr,pos,val);
    }
    tree[v] = (tree[v*2] ^ tree[v*2+1]);
}
ll get(ll v, ll tl, ll tr, ll l, ll r){
    if(tl > r || tr < l){
        return 0;
    }
    if(tl >= l && tr <= r){
        return tree[v];
    }
    ll tm = (tl+tr)>>1;
    ll s1 = get(v*2,tl,tm,l,r);
    ll s2 = get(v*2+1,tm+1,tr,l,r);
    return (s1^s2);
}
void solve(){
    ll n,q,i,j,cur=0,l,r,qt;
    cin>>n>>q;
    vl v(n+1);
    for(i=1;i<=n;i++){
        cin>>v[i];
    }
    for(i=1;i<=n;i+=2){
        id[i] = ++cur;
        a[cur] = v[i];
    }
    for(i=2;i<=n;i+=2){
        id[i] = ++cur;
        a[cur] = v[i];
    }
    build(1,1,n);
    while(q--){
        cin>>qt;
        if(qt == 1){
            cin>>l>>r;
            update(1,1,n,id[l],r);
        }
        else{
            cin>>l>>r;
            if((r-l+1) % 2 == 0){cout << 0 << endl;continue;}
            cout << get(1,1,n,id[l],id[r]) << endl;
        }
    }
}
int main(){
    ll t=1;
    //cin>>t;
    while(t--){
        solve();
    }
}
/*
5 6
1 2 3 4 5
2 1 3
1 1 3
2 1 5
2 4 4
1 1 1
2 4 4

*/

Compilation message

xoranges.cpp: In function 'void solve()':
xoranges.cpp:58:14: warning: unused variable 'j' [-Wunused-variable]
   58 |     ll n,q,i,j,cur=0,l,r,qt;
      |              ^

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 320 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 8 ms 704 KB Output is correct
12 Correct 8 ms 576 KB Output is correct
13 Correct 10 ms 596 KB Output is correct
14 Correct 10 ms 696 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 400 ms 7520 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 8 ms 704 KB Output is correct
12 Correct 8 ms 576 KB Output is correct
13 Correct 10 ms 596 KB Output is correct
14 Correct 10 ms 696 KB Output is correct
15 Incorrect 400 ms 7520 KB Output isn't correct
16 Halted 0 ms 0 KB -