Submission #517019

#	Time	Username	Problem	Language	Result	Execution time	Memory
517019		amukkalir	Holiday (IOI14_holiday)	C++17	47 / 100	5030 ms	2712 KiB

holiday

#include <bits/stdc++.h>
#include "holiday.h"
using namespace std; 
typedef long long ll;

const int nax = 20; 
int n; 
int s, d; 

int cost (int l, int r) {
    return (r-l) + min(abs(s-l), abs(r-s)); 
}

bool ok (int mask) {
    int l=n, r=0; 
    for(int i=0; (1<<i)<=mask; i++) {
        if(mask & (1<<i)) {
            l = min(l, i); 
            r = max(r, i); 
        }
    }

    int travel = (r-l) + min(abs(s-l), abs(r-s)); 
    return travel + __builtin_popcount(mask) <= d; 
}

long long int findMaxAttraction(int N, int S, int D, int attraction[]) {
    n = N; 
    s = S; 
    d = D; 

    ll ans = 0; 

    priority_queue<ll, vector<ll>, greater<ll>> pq;

    ll sum = 0; 
    
    for(int i=s;i<n;i++){
        int rem = d - cost(s,i);
        if(rem <= 0) break;

        sum += attraction[i];
        pq.push(attraction[i]); 
        while(pq.size() > rem) {
            sum -= pq.top(); 
            pq.pop(); 
        }

        priority_queue<ll, vector<ll>, greater<ll>> q; 
        q = pq; 

        ll z = sum; 
        for(int j=s-1; j>=0; j--) {
            rem = d - cost(j, i); 
            if(rem <= 0) break;
            z += attraction[j]; 
            q.push(attraction[j]); 
            while(q.size() > rem) {
                z -= q.top(); 
                q.pop(); 
            }
            ans = max(ans, z); 
        }

        ans = max(ans, sum); 
    }

    return ans; 
}

/*

*/

Compilation message (stderr)

holiday.cpp: In function 'long long int findMaxAttraction(int, int, int, int*)':
holiday.cpp:44:25: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int, std::vector<long long int>, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |         while(pq.size() > rem) {
      |               ~~~~~~~~~~^~~~~
holiday.cpp:58:28: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int, std::vector<long long int>, std::greater<long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   58 |             while(q.size() > rem) {
      |                   ~~~~~~~~~^~~~~

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 17 / 17
• Subtask 4: 0 / 53