Submission #638436

#	Time	Username	Problem	Language	Result	Execution time	Memory
638436		ak2006	Nivelle (COCI20_nivelle)	C++14	110 / 110	30 ms	768 KiB

nivelle

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
    fast;
}
int main()
{
    setIO();
    int n;
    cin>>n;
    
    vi a(n + 1);
    for (int i = 1;i<=n;i++){
        char x;
        cin>>x;

        a[i] = x - 'a';

    }
    
    ll ansNum = 1,L = 1,R = 1,ansCur = 1;
    for (int num = 1;num<=26;num++){
        vi freq(27);
        ll l = 1,r = 1,cnt = 0;//[l,r)
        ll maxL = 1,maxR = 1;
        ll cur = 1;
        
        while (r <= n){
            while (cnt <= num && r <= n){
                if (r - l > cur){
                    cur = r - l;
                    maxL = l;
                    maxR = r - 1;
                }
                freq[a[r]]++;
                if (freq[a[r]] == 1)cnt++;
                r++;
            }
            if (cnt <= num){
                if (r - l > cur){
                    cur = r - l;
                    maxL = l;
                    maxR = r - 1;
                }
            }
            while (cnt > num){
                freq[a[l]]--;
                if (freq[a[l]] == 0)cnt--;
                l++;
            }
        }     
        
        if (num * ansCur < ansNum * cur){
            ansCur = cur;
            ansNum = num;
            L = maxL;
            R = maxR;
        }
        else if (num * ansCur == ansNum * cur and (maxL < L or (maxL == L and maxR < R))){
            L = maxL;
            R = maxR;
        }
    }

    cout<<L<<" "<<R<<'\n';
    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 17 / 17
• Subtask 3: 13 / 13
• Subtask 4: 25 / 25
• Subtask 5: 48 / 48