Submission #1109761

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109761		TrinhKhanhDung	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	482 ms	293932 KiB

boxes

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(1e9 + 7)
#include "boxes.h"

using namespace std;

template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

const int lim = 1e7 + 10;

long long f[lim], g[lim];

long long delivery(int N, int K, int L, int positions[]){
    int mid = (L + 1) / 2;
    for(int i = 0; i < N; i++){
        if(i + 1 >= K) f[i + 1] = f[i + 1 - K] + 2LL * positions[i];
        else f[i + 1] = 2LL * positions[i];
    }
    for(int i = 0; i < N; i++){
        if(i + 1 >= K) g[i + 1] = g[i + 1 - K] + 2LL * (L - positions[N - i - 1]);
        else g[i + 1] = 2LL * (L - positions[N - i - 1]);
    }
    long long ans = oo;
    for(int i = 0; i <= N; i++){
        minimize(ans, f[i] + g[N - i]);
        minimize(ans, f[i] + g[max(0, N - i - K)] + L);
    }
    return ans;
}

// int main(){
//     ios_base::sync_with_stdio(0); cin.tie(0);
//     // freopen("ADVERT.inp","r",stdin);
//     // freopen("ADVERT.out","w",stdout);

//     cout << delivery(3, 2, 8, {1, 2, 5});

//     return 0;
// }

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:36:9: warning: unused variable 'mid' [-Wunused-variable]
   36 |     int mid = (L + 1) / 2;
      |         ^~~

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