Submission #1106374

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106374		12345678	Nivelle (COCI20_nivelle)	C++17	110 / 110	27 ms	848 KiB

nivelle

#include <bits/stdc++.h>

using namespace std;

int n, a=1, b=1, l=1, r=1, lst[27];
string s;
set<int> ms;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>s;
    for (int i=0; i<26; i++) lst[i]=1;
    ms.insert(1);
    for (int i=0; i<n; i++)
    {
        if (lst[s[i]-'a']!=1) ms.erase(lst[s[i]-'a']);
        lst[s[i]-'a']=-i;
        ms.insert(-i);
        int cnt=0;
        for (auto x:ms)
        {
            int tmp=-x;
            cnt++;
            if (cnt>1)
            {
                if (a*(i-tmp)>b*(cnt-1)) a=cnt-1, b=i-tmp, l=tmp+2, r=i+1;
                //cout<<"debug "<<i<<' '<<tmp<<' '<<a<<' '<<b<<' '<<cnt-1<<' '<<i-tmp<<'\n';
            }
        }
    }
    cout<<l<<' '<<r;
}

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