Submission #203821

#	Time	Username	Problem	Language	Result	Execution time	Memory
203821		blacktulip	JJOOII 2 (JOI20_ho_t2)	C++17	13 / 100	2083 ms	772 KiB

ho_t2

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo MAX = -1000000000000000000;
const lo MIN = 1000000000000000000;
const lo inf = 1000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,ans=inf;
int cev;
string s;
vector<int> v;

int main(void){
	fio();
	cin>>n>>k>>s;
	for(int i=0;i<n;i++){
		if(s[i]!='J')continue;
		cev=0;
		int ind=-1;
		for(int j=i;j<n;j++){
			if(s[j]=='J')cev++;
			if(cev==k){ind=j;break;}
		}
		//~ cout<<cev<<endl;
		if(ind==-1)continue;
		cev=0;
		for(int j=ind;j<n;j++){
			if(s[j]=='O')cev++;
			//~ cout<<
			if(cev==k){ind=j;break;}
		}
		//~ cout<<cev<<endl;
		if(cev!=k)continue;
		cev=0;
		for(int j=ind;j<n;j++){
			if(s[j]=='I')cev++;
			if(cev==k){ind=j;break;}
		}
		//~ cout<<ind<<" : : "<<i<<endl;
		if(cev==k)ans=min(ans,ind-i+1-k*3);
	}
	if(ans==inf)ans=-1;
	cout<<ans<<endl;
	return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 12 / 12
• Subtask 3: 0 / 87