제출 #472435

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
472435		_L__	Cipele (COCI18_cipele)	C++17	90 / 90	400 ms	3668 KiB

cipele

// This code is written by _L__
#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;
template<class T> using ordered_set = tree<T, null_type , less<T> , rb_tree_tag , tree_order_statistics_node_update>;
#define endl '\n'
#define F_word ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
typedef long long ll;
typedef long double ld;
const ll mod = 1e9+7, N = 1e5+300, inf = 1e18;
const ld E = 1e-6;
#define ff first
#define ss second

ll a[N], b[N], n, m;

bool check(ll mid){
    ll cnt = 0;
    ll cur = 0-1;
    if(n<=m){
        for(int i = 0; i < n; ++i){
            ll l = lower_bound(b, b+m, a[i]-mid)-b;
            ll r = upper_bound(b, b+m, a[i]+mid)-b-1;
            if(l>r)return 0;
            if(cur+1 > r)return 0;
            cur = max(l, cur+1);
        }
        return 1;
    } else {
        for(int i = 0; i < m; ++i){
            ll l = lower_bound(a, a+n, b[i]-mid)-a;
            ll r = upper_bound(a, a+n, b[i]+mid)-a-1;
            if(l>r) return 0;
            if(cur+1 > r) return 0;
            cur = max(l, cur+1);
        }
        return 1;
    }
}

ll lower(){
    ll l = 0, r = 1e11, ans = 0;
    while(l <= r){
        ll mid = (l+r)/2;
        if(check(mid)){
            ans = mid;
            r = mid-1;
        } else l = mid+1;
    }
    return ans;
}

int main(void){
    F_word;
    cin >> n >> m;
    for(int i = 0; i < n; ++i) cin >> a[i];
    for(int i = 0; i < m; ++i) cin >> b[i];
    sort(a, a+n); sort(b, b+m);
    cout << lower() << endl;
}

컴파일 시 표준 에러 (stderr) 메시지

cipele.cpp: In function 'bool check(ll)':
cipele.cpp:20:8: warning: unused variable 'cnt' [-Wunused-variable]
   20 |     ll cnt = 0;
      |        ^~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 9 / 9
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9