Submission #652467

#	Time	Username	Problem	Language	Result	Execution time	Memory
652467		jiahng	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	4 ms	340 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define int ll
typedef pair<int,int> pi;
typedef vector <int> vi;
typedef vector <pi> vpi;
typedef pair<pi, ll> pii;
typedef set <ll> si;
typedef long double ld;
#define f first
#define s second
#define mp make_pair
#define FOR(i,s,e) for(int i=s;i<=int(e);++i)
#define DEC(i,s,e) for(int i=s;i>=int(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define maxn 10000010
#define INF (ll)1e9
#define MOD 1000000007
typedef pair <vi, int> pvi;
typedef pair <int,pi> ipi;
typedef vector <pii> vpii;

int pre[maxn], post[maxn];
long long delivery(int32_t N, int32_t K, int32_t L, int32_t p[]) {
    int cur = 0;
    FOR(i,0,N-1){
        pre[i] = (i < K ? 0 : pre[i-K]) + 2 * p[i];
    }

    cur = 0;
    DEC(i,N-1,0){
        post[i] = (i + K >= N ? 0 : pre[i+K]) + 2 * (L-p[i]);
    }
    //FOR(i,0,N-1){
        //cout << pre[i] << ' ' << post[i] << '\n';
        //}

    int ans = min(pre[N-1], post[0]);
    ans = min(ans, (ll)((N + K - 1) / K) * L);
    FOR(i,0,N-1){
        ans = min(ans, pre[i] + ((N - i - 1 + K - 1) / K) * L);
        ans = min(ans, post[i] + ((i + K - 1) / K) * L);
    }

    FOR(i,0,N-2) FOR(j,i+1,N-1){
        ans = min(ans, pre[i] + post[j] + ((j - i - 1 + K - 1) / K) * L);
    }
        //ans = min(ans, (pre[i] + post[i+1]));
    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int32_t, int32_t, int32_t, int32_t*)':
boxes.cpp:34:9: warning: variable 'cur' set but not used [-Wunused-but-set-variable]
   34 |     int cur = 0;
      |         ^~~

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