oj.uz

Submission #550059

# Submission time Handle Problem Language Result Execution time Memory
550059 2022-04-17T07:16:49 Z Vovamatrix XORanges (eJOI19_xoranges) C++14
100 / 100
 116 ms 11020 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define sc second
#define th third
#define fo fourth
#define pii pair<int,int>
#define pll pair<ll,ll>
#define ldb double
#define endl "\n"
 
#define all(data)       data.begin(),data.end()
#define TYPEMAX(type)   std::numeric_limits<type>::max()
#define TYPEMIN(type)   std::numeric_limits<type>::min()
#define MAXN 200007
 
void update(vector<ll>& v, ll k, ll x)
{
    while(k<=v.size())
    {
        v[k]^=x;
        k+=k&-k;
    }
}
ll prefsum1(const vector<ll>& v, ll k)
{
    ll sum=0;
    while(k>0)
    {
        sum^=v[k];
        k-=k&-k;
    }
    return sum;
}
int main()
{
    ios::sync_with_stdio(false); cin.tie(0);
    ll n,q; cin>>n>>q;
    ll a[n+1]; a[0]=0;
    vector<ll> BIT2(n+1,0),BIT3(n+1,0);
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        if(i%2==0) update(BIT2, i, a[i]);
        else update(BIT3, i, a[i]);
    }
    for(int i=1;i<=q;i++)
    {
        ll x,y,z; cin>>x>>y>>z;
        if(x==2)
        {
            if((z-y+1)%2==0) cout<<0<<endl;
            else
            {
                if(y%2==0) cout<<((prefsum1(BIT2, z))^(prefsum1(BIT2, y-1)))<<endl;
                else cout<<((prefsum1(BIT3, z))^(prefsum1(BIT3, y-1)))<<endl;
            }
        }
        else
        {
            if(y%2==0) update(BIT2, y, z^a[y]);
            else update(BIT3, y, z^a[y]);
          	a[y]=z;
        }
    }
    return 0;
}

Compilation message

xoranges.cpp: In function 'void update(std::vector<long long int>&, long long int, long long int)':
xoranges.cpp:23:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     while(k<=v.size())
      |           ~^~~~~~~~~~

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 320 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 1 ms 324 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 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 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 3 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 10988 KB Output is correct
2 Correct 116 ms 11020 KB Output is correct
3 Correct 96 ms 11004 KB Output is correct
4 Correct 92 ms 10636 KB Output is correct
5 Correct 96 ms 10636 KB Output is correct

Subtask #5
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 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 2 ms 460 KB Output is correct
12 Correct 3 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 99 ms 10988 KB Output is correct
16 Correct 116 ms 11020 KB Output is correct
17 Correct 96 ms 11004 KB Output is correct
18 Correct 92 ms 10636 KB Output is correct
19 Correct 96 ms 10636 KB Output is correct
20 Correct 96 ms 10764 KB Output is correct
21 Correct 92 ms 10760 KB Output is correct
22 Correct 110 ms 10808 KB Output is correct
23 Correct 88 ms 10600 KB Output is correct
24 Correct 88 ms 10700 KB Output is correct