oj.uz

Submission #882706

# Submission time Handle Problem Language Result Execution time Memory
882706 2023-12-03T13:35:50 Z Ahmed_Solyman Izbori (COCI22_izbori) C++14
110 / 110
 1963 ms 40908 KB 
/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
const int N=2e5+5;
int n,arr[N];
ll solve(int l,int r){
    if(l>r){
        return 0;
    }
    if(l==r){
        return 1;
    }
    int mid=l+r>>1;
    ll ret=0;
    set<int>s;
    map<int,int>fr;
    for(int i=mid;i<=r;i++){
        fr[arr[i]]++;
        if(fr[arr[i]]*2>i-mid+1){
            s.insert(arr[i]);
        }
    }
    fr.clear();
    for(int i=mid;i>=l;i--){
        fr[arr[i]]++;
        if(fr[arr[i]]*2>mid-i){
            s.insert(arr[i]);
        }
    }
    for(auto x:s){// atmost log n numbers
        fr.clear();
        int prefix=0;
        fr[prefix]++;
        for(int i=l;i<mid;i++){
            prefix+=(arr[i]==x?1:-1);
            fr[prefix]++;
        }
        int sz=(r-l+1);
        for(int i=-sz;i<=sz;i++){
            fr[i]+=fr[i-1];
        }
        for(int i=mid;i<=r;i++){
            prefix+=(arr[i]==x?1:-1);
            ret+=fr[prefix-1];
        }
    }
    return ret+solve(l,mid-1)+solve(mid+1,r);
}
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    #ifndef ONLINE_JUDGE
///    freopen("input.in", "r", stdin);
///    freopen("output.out", "w", stdout);
    #endif
    fast
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>arr[i];
    }
    cout<<solve(0,n-1)<<endl;
    return 0;
}

Compilation message

Main.cpp: In function 'll solve(int, int)':
Main.cpp:47:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   47 |     int mid=l+r>>1;
      |             ~^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 4 ms 600 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 12 ms 852 KB Output is correct
10 Correct 8 ms 604 KB Output is correct
11 Correct 9 ms 852 KB Output is correct
12 Correct 9 ms 604 KB Output is correct
13 Correct 9 ms 752 KB Output is correct
14 Correct 9 ms 604 KB Output is correct
15 Correct 9 ms 612 KB Output is correct
16 Correct 9 ms 600 KB Output is correct
17 Correct 5 ms 604 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 978 ms 25856 KB Output is correct
2 Correct 1354 ms 33780 KB Output is correct
3 Correct 736 ms 19980 KB Output is correct
4 Correct 1416 ms 35344 KB Output is correct
5 Correct 1470 ms 36704 KB Output is correct
6 Correct 1566 ms 38796 KB Output is correct
7 Correct 1560 ms 38996 KB Output is correct
8 Correct 1569 ms 38796 KB Output is correct
9 Correct 1626 ms 39052 KB Output is correct
10 Correct 1574 ms 38788 KB Output is correct
11 Correct 994 ms 38628 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 4 ms 600 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 12 ms 852 KB Output is correct
10 Correct 8 ms 604 KB Output is correct
11 Correct 9 ms 852 KB Output is correct
12 Correct 9 ms 604 KB Output is correct
13 Correct 9 ms 752 KB Output is correct
14 Correct 9 ms 604 KB Output is correct
15 Correct 9 ms 612 KB Output is correct
16 Correct 9 ms 600 KB Output is correct
17 Correct 5 ms 604 KB Output is correct
18 Correct 978 ms 25856 KB Output is correct
19 Correct 1354 ms 33780 KB Output is correct
20 Correct 736 ms 19980 KB Output is correct
21 Correct 1416 ms 35344 KB Output is correct
22 Correct 1470 ms 36704 KB Output is correct
23 Correct 1566 ms 38796 KB Output is correct
24 Correct 1560 ms 38996 KB Output is correct
25 Correct 1569 ms 38796 KB Output is correct
26 Correct 1626 ms 39052 KB Output is correct
27 Correct 1574 ms 38788 KB Output is correct
28 Correct 994 ms 38628 KB Output is correct
29 Correct 1010 ms 38792 KB Output is correct
30 Correct 292 ms 7716 KB Output is correct
31 Correct 677 ms 15632 KB Output is correct
32 Correct 1963 ms 37792 KB Output is correct
33 Correct 747 ms 16624 KB Output is correct
34 Correct 788 ms 17372 KB Output is correct
35 Correct 477 ms 11432 KB Output is correct
36 Correct 265 ms 7020 KB Output is correct
37 Correct 320 ms 8440 KB Output is correct
38 Correct 1856 ms 39200 KB Output is correct
39 Correct 1738 ms 39188 KB Output is correct
40 Correct 1922 ms 39204 KB Output is correct
41 Correct 1840 ms 39416 KB Output is correct
42 Correct 1947 ms 39188 KB Output is correct
43 Correct 1777 ms 40764 KB Output is correct
44 Correct 1769 ms 40772 KB Output is correct
45 Correct 1756 ms 40772 KB Output is correct
46 Correct 1781 ms 40908 KB Output is correct
47 Correct 1767 ms 40772 KB Output is correct
48 Correct 1901 ms 39724 KB Output is correct
49 Correct 1907 ms 39636 KB Output is correct
50 Correct 1844 ms 39604 KB Output is correct
51 Correct 1922 ms 39364 KB Output is correct
52 Correct 1879 ms 39532 KB Output is correct
53 Correct 1813 ms 39528 KB Output is correct
54 Correct 1793 ms 39652 KB Output is correct