Submission #198498

#	Time	Username	Problem	Language	Result	Execution time	Memory
198498		alishahali1382	Nivelle (COCI20_nivelle)	C++14	110 / 110	162 ms	10996 KiB

nivelle

#include <bits/stdc++.h>
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const ld eps=1e-7;
const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod = 1000000007;
const int MAXN = 100010, SGM=26;

int n, m, k, u, v, x, y, t, a, b, ans1=SGM, ans2, L, R;
int last[MAXN][SGM];
bool mark[SGM];
string S;

void upd(int l, int r, int t){
	if (t*ans2>(r-l+1)*ans1) return ;
	ans1=t;
	ans2=r-l+1;
	R=r;
	L=l;
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin>>n>>S;
	S="."+S;
	for (int i=1; i<=n; i++){
		memcpy(last[i], last[i-1], sizeof(last[i]));
		last[i][S[i]-'a']=i;
	}
	
	for (int i=1; i<=n; i++){
		memset(mark, 0, sizeof(mark));
		int cnt=1;
		mark[S[i]-'a']=1;
		int l=i;
		upd(l, i, cnt);
		while (l){
			int nl=0;
			for (int j=0; j<SGM; j++) if (!mark[j]) nl=max(nl, last[l][j]);
			l=nl;
			upd(l+1, i, cnt);
			mark[S[l]-'a']=1;
			cnt++;
		}
	}
	
	
	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