제출 #423418

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
423418		amunduzbaev	JJOOII 2 (JOI20_ho_t2)	C++14	100 / 100	14 ms	3024 KiB

ho_t2

/* made by amunduzbaev */
 
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
 
using namespace std;
//~ using namespace __gnu_pbds;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update> ordered_set;
 
const int N = 2e5+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, s, t, q, ans, res, a[N];
int pref[3][N];

void solve(int t_case){
	string s;
	cin>>n>>k>>s;
	vii tt[3];
	for(int i=0;i<n;i++){
		if(s[i] == 'J') tt[0].pb(i);
		if(s[i] == 'O') tt[1].pb(i);
		if(s[i] == 'I') tt[2].pb(i);
	}
	
	if(min({sz(tt[0]), sz(tt[1]), sz(tt[2])}) < k) { cout<<-1<<"\n"; return; }
	deque<int> ss;

	int res = inf;
	auto check = [&]() -> void{
		auto lx = ub(all(tt[0]), ss.front());
		auto rx = lb(all(tt[2]), ss.back());
		if(lx != tt[0].begin() && rx != tt[2].end()){
			int l = lx - tt[0].begin() - 1, r = rx - tt[2].begin();
			if(r+k-1 >= sz(tt[2]) || l-k+1 < 0) return;
			//~ cout<<l-k+1<<tt[0][l]<<" "<<tt[2][r]<<"\n";
			//~ cout<<tt[2][r+k-1]<<" "<<tt[0][l-k+1]<<"\n";
			int cost = tt[2][r+k-1] - tt[0][l-k+1] + 1 - 3 * k;
			umin(res, cost);
		}
	}; 

/*

9 2
JOJOIOIJI

*/

	for(int i=0;i<k;i++) ss.pb(tt[1][i]);
	check();
	for(int i=k;i<sz(tt[1]);i++) ss.pop_front(), ss.pb(tt[1][i]), check();
	
	
	if(res == inf) cout<<-1<<"\n";
	else cout<<res<<"\n";
}

signed main(){
	NeedForSpeed
	if(MULTI){
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} else solve(1);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

ho_t2.cpp: In function 'void usaco(std::string)':
ho_t2.cpp:32:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:33:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |  freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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