Submission #844586

#	Time	Username	Problem	Language	Result	Execution time	Memory
844586		vjudge1	Nivelle (COCI20_nivelle)	C++17	110 / 110	152 ms	628 KiB

nivelle

#include <bits/stdc++.h>
#define int long long
using namespace std;
int32_t main(){
	int n;cin>>n;
	string str;cin>>str;
	vector<int> ilk(26,-1);
	vector<int> kuc(26,0);
	int frac1=1,frac2=1;
	int ansl=0,ansr=0;
	for (int i = n-1; i >= 0; i--){
		ilk[str[i]-'a']=i;
		int crr = 0;
		for (int j = 0; j < 26; ++j)
		{
			if (ilk[j]!=-1) crr++;
		}
		if (crr*frac2<(n-i+1)*frac1){
			frac1=crr;
			frac2=n-i+1;
			ansl=i;
			ansr=n-1;
		}
		for (int j = 0; j < 26; j++){
			if (ilk[j]==-1) continue;
			if (ilk[j]==i) continue;
			int crrr = 0;
			for (int k = 0; k < 26; k++){
				if (ilk[k]!=-1 && ilk[k]<=ilk[j]-1){
					crrr++;
				}
			}
			if (crrr==0) continue;
			if (crrr*frac2<(ilk[j]-i)*frac1){
				frac1=crrr;
				frac2=ilk[j]-i;
				ansl=i;
				ansr=ilk[j]-1;
			}
		}
	}
	cout<<ansl+1<<" "<<ansr+1<<endl;
}

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