Submission #745456

#	Time	Username	Problem	Language	Result	Execution time	Memory
745456		Pacybwoah	JJOOII 2 (JOI20_ho_t2)	C++14	100 / 100	10 ms	2012 KiB

ho_t2

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#define ll long long
using namespace std;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    string s;
    int n,k,jcnt=0,ocnt=0,icnt=0;
    cin>>n>>k;
    cin>>s;
    vector<int> jj,oo,ii;
    for(int i=0;i<n;i++){
        if(s[i]=='J') jj.push_back(i);
        else if(s[i]=='O') oo.push_back(i);
        else ii.push_back(i);
    }
    int ans=1e9;
    jcnt=jj.size();
    ocnt=oo.size();
    icnt=ii.size();
    for(int i=0;i+k-1<jcnt;i++){
        int ooo=lower_bound(oo.begin(),oo.end(),jj[i+k-1])-oo.begin();
        if(ooo+k-1>=ocnt) continue;
        int iii=lower_bound(ii.begin(),ii.end(),oo[ooo+k-1])-ii.begin();
        if(iii+k-1>=icnt) continue;
        else ans=min(ans,ii[iii+k-1]-jj[i]+1-k*3);
    }
    if(ans==1e9) cout<<-1;
    else cout<<ans;
}

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