Submission #239274

#	Time	Username	Problem	Language	Result	Execution time	Memory
239274		alishahali1382	JJOOII 2 (JOI20_ho_t2)	C++14	100 / 100	22 ms	2052 KiB

ho_t2

#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const ld eps=1e-7;
const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod=1000000007;
const int MAXN=100010, LOG=20;

int n, m, k, u, v, x, y, t, a, b, ans=inf;
int A[MAXN];
vector<int> J, O, I;
string S;

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin>>n>>k>>S;
	for (int i=0; i<n; i++){
		if (S[i]=='J') J.pb(i);
		if (S[i]=='O') O.pb(i);
		if (S[i]=='I') I.pb(i);
	}
	J.pb(inf);
	O.pb(inf);
	I.pb(inf);
	
	for (int i=0; i<n; i++) if (S[i]=='J'){
		int pos=i, tmp;
		tmp=lower_bound(all(J), pos)-J.begin();
		if (tmp+k-1>=J.size()-1) continue ;
		pos=J[tmp+k-1]+1;
		
		tmp=lower_bound(all(O), pos)-O.begin();
		if (tmp+k-1>=O.size()-1) continue ;
		pos=O[tmp+k-1]+1;
		
		tmp=lower_bound(all(I), pos)-I.begin();
		if (tmp+k-1>=I.size()-1) continue ;
		pos=I[tmp+k-1]+1;
		
		ans=min(ans, pos-i-3*k);
	}
	if (ans>n) ans=-1;
	cout<<ans<<'\n';
	
	return 0;
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:48:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (tmp+k-1>=J.size()-1) continue ;
       ~~~~~~~^~~~~~~~~~~~
ho_t2.cpp:52:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (tmp+k-1>=O.size()-1) continue ;
       ~~~~~~~^~~~~~~~~~~~
ho_t2.cpp:56:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (tmp+k-1>=I.size()-1) continue ;
       ~~~~~~~^~~~~~~~~~~~

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