Submission #1097996

#	Time	Username	Problem	Language	Result	Execution time	Memory
1097996		Tymond	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	1 ms	604 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::high_resolution_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif
 
struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }
 
    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

int dist(int x, int l){
    return min(x, l - x);
}

ll delivery(int N, int K, int L, int p[]){
    int n = N;
    int k = K;
    int l = L;
    vi pos;
    for(int i = 0; i < n; i++){
        pos.pb(p[i]);
    }

    sort(all(pos));
    deque<int> q;
    for(auto ele : pos){
        q.push_back(ele);
    }

    ll ans = 0LL;
    while(sz(q)){
        if(q.front() <= (l - q.back())){
            int v;
            int x = 0;
            while(sz(q) && x < k){
                x++;
                v = q.front();
                q.pop_front();
            }

            ans += v;
            ans += dist(v, l);
        }else{
            int v;
            int x = 0;
            while(sz(q) && x < k){
                x++;
                v = q.back();
                q.pop_back();
            }

            ans += (l - v);
            ans += dist(v, l);
        }
    }

    return ans;
}

/*int main(){
    int p[3] = {1, 2, 5};
    cout << delivery(3, 2, 8, p);
    return 0;
}*/

Compilation message (stderr)

boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:76:17: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
   76 |             int v;
      |                 ^
boxes.cpp:65:17: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
   65 |             int v;
      |                 ^

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30