Submission #1343434

#	Time	Username	Problem	Language	Result	Execution time	Memory
1343434		minhtien	JJOOII 2 (JOI20_ho_t2)	C++20	0 / 100	1 ms	344 KiB

ho_t2

#include <bits/stdc++.h>

using namespace std;
const int N=2e5+6;
int n,k;
string s;
int main()
{
    cin >> n >>k;
    int k1=k,k2=k;
    cin >>s;
    s=" "+s;
    string t="";
    while(k--){
        t+="J";
    }
    while(k1--){
        t+="O";
    }
    while(k2--){
        t+="I";
    }
    int n1=t.size();
    t=" "+t;
    int j=1;
    int dem=0;
    int i=1;
    while(i<=n && j<=n1){
        if(s[i]!=t[j]){
            i++;
            if(j>1 && j!=n1){
                dem++;
            }
            else if(j>n1){
                dem++;
            }
        }
        else{
            i++;
            j++;
        }
    }
    if(j>n1){
        cout << dem;
    }
    else cout << -1;
    return 0;
}

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