Submission #356793

#	Time	Username	Problem	Language	Result	Execution time	Memory
356793		Vladth11	Watching (JOI13_watching)	C++14	0 / 100	3 ms	364 KiB

watching

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define debug(x) cerr << #x << " " << x << "\n"
#define debug_with_space(x) cerr << #x << " " << x << " "

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <ll, pii> piii;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> OST;

const ll NMAX = 5001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 101;
const ll nr_of_bits = 35;

ll n, p, q, pp, qq;
ll v[NMAX];

bool OK(ll w){
    ll last = -1;
    p = pp;
    q = qq;
    for(ll i = 1; i <= n; i++){
        if(last <= v[i]){
            ll idx = 0, pas = 1 << 12;
            while(pas){
                if(idx + pas <= n && v[idx + pas] <= v[i] + w)
                    idx += pas;
                pas /= 2;
            }
            ll r = 0;
            pas = (1 << 12);
            while(pas){
                if(r + pas <= n && v[r + pas] <= v[i] + 2 * w)
                    r += pas;
                pas /= 2;
            }
            if(p == 0 && q == 0)
                return 0;
            if(p == 0){
                q--;
                last = v[i] + 2 * w;
            }else if(q == 0){
                p--;
                last = v[i] + w;
            }else{
                if(idx == r){
                    last = v[i] + w;
                    p--;
                }else{
                    last = v[i] + 2 * w;
                    q--;
                }
            }
        }
    }
    return 1;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll i;
    cin >> n >> p >> q;
    pp = p;
    qq = q;
    for(i = 1; i <= n; i++){
        cin >> v[i];
    }
    sort(v + 1, v + n + 1);
    ll r = 0, pas = (1 << 30);
    while(pas){
        if(!OK(r + pas))
        r += pas;
        pas /= 2;
    }
    cout << r + 1;
    return 0;
}

• Subtask 1: 0 / 50
• Subtask 2: 0 / 50