Submission #1279329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279329		LmaoLmao	JJOOII 2 (JOI20_ho_t2)	C++20	13 / 100	3 ms	3024 KiB

ho_t2

#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define name "a"
using namespace std;

using ii = pair<int,int>;
using aa = array<int,3>;
const int N = 1e5+5;

char a[N];
int pre[3][N];

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n,k;
    cin >> n >> k;
    for(int i=1;i<=n;i++) {
        cin >> a[i];
        for(int j=0;j<3;j++) {
            pre[j][i]=pre[j][i-1];
        }
        if(a[i]=='J') {
            pre[0][i]++;
        } else
        if(a[i]=='O') {
            pre[1][i]++;
        }
        else {
            pre[2][i]++;
        }
    }
    int ans=1e9;
    for(int i=1;i<=n;i++) {
        int x1=lower_bound(pre[0]+1,pre[0]+1+n,pre[0][i-1]+k)-pre[0];
        int x2=lower_bound(pre[1]+1,pre[1]+1+n,pre[1][x1]+k)-pre[1];
        int x3=lower_bound(pre[2]+1,pre[2]+1+n,pre[2][x2]+k)-pre[2];
        if(max({x1,x2,x3})<=n) {
            ans=min(ans,x3-i+1-3*k);
        }
        //cout << x1 << ' ' << x2 << ' ' << x3 << endl;
    }
    if(ans==1e9) cout << -1; else
    cout << ans;
    return 0;
}

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