Submission #203843

#	Time	Username	Problem	Language	Result	Execution time	Memory
203843		Evirir	JJOOII 2 (JOI20_ho_t2)	C++17	0 / 100	5 ms	380 KiB

ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#define watch(x) cout<<(#x)<<"="<<(x)<<'\n'
#define mset(d,val) memset(d,val,sizeof(d))
#define setp(x) cout<<fixed<<setprecision(x)
#define forn(i,a,b) for(int i=a;i<b;i++)
#define fore(i,a,b) for(int i=a;i<=b;i++)
#define pb push_back
#define F first
#define S second
#define INF ll(1e18)
#define MOD 998244353
#define pqueue priority_queue
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;

#define MAXN 100005

int conv(char c){
	if(c=='J') return 0;
	if(c=='O') return 1;
	return 2;
}

int n,k;
string s;
vi loc[3];
ll ans=INF;

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	
	cin>>n>>k;
	cin>>s;
	
	forn(i,0,n){
		loc[conv(s[i])].pb(i);
	}
	
	for(auto p0=loc[0].begin();p0!=loc[0].end();p0++)
	{
		int d1=*p0;
		auto p1=p0+k-1;
		if(p1==loc[0].end()) break;
		
		auto p2=upper_bound(loc[1].begin(),loc[1].end(),*p1);
		if(p2==loc[1].end()) break;
		p2+=k-1;
		if(p2==loc[1].end()) break;
		
		auto p3=upper_bound(loc[2].begin(),loc[2].end(),*p2);
		if(p3==loc[2].end()) break;
		p3+=k-1;
		if(p3==loc[2].end()) break;
		
		ans=min(ans, *p3-d1+1-3*k);
	}
	
	if(ans==INF) cout<<-1<<'\n';
	else cout<<ans<<'\n';
	
	return 0;
}

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