Submission #1048865

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048865		Minbaev	JJOOII 2 (JOI20_ho_t2)	C++17	13 / 100	2092 ms	1116 KiB

ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define s second
#define int long long
#define ll long long
#define pii pair<int,int>
#define ar array
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
template<class T> using st = tree<T, null_type, less_equal<T>, 
rb_tree_tag, tree_order_statistics_node_update>;
 
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;
const int N = 3e5 + 5;
const int md = 998244353;
 
int binpow(int a, int b){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2);
		return (c*c)%mod;
	}
	return (binpow(a,b-1)*a)%mod;
}
 
int divi(int a, int b){
	return (a*(binpow(b,mod-2)))%mod;
}
 
int n,m,k;

void solve(){
	
	cin >> n >> m;
	
	string str, a;
	cin >> str;
	
	for(int i = 0;i<m;i++)a += 'J';
	for(int i = 0;i<m;i++)a += 'O';
	for(int i = 0;i<m;i++)a += 'I';
	
	int ans = inf;
	
	for(int i = 0;i<n;i++){
		int ind = 0;
		for(int j = i;j<n;j++){
			if(str[j] == a[ind]){
				ind += 1;
				if(ind == m*3){
					//~ cout << i << " " << j << "\n";
					umin(ans, (j-i+1)-m*3);
					break;
				}
			}
		}
	}
	
	if(ans == inf)ans = -1;
	cout << ans << "\n";
	
	

}
/*
5 4
35 100
70 70
45 15
80 40
20 95
20 50 0
10 10 0
60 60 0
0 100 0
*/
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}
 

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