Submission #813140

#	Time	Username	Problem	Language	Result	Execution time	Memory
813140		Kerim	Boxes with souvenirs (IOI15_boxes)	C++17	20 / 100	0 ms	212 KiB

boxes

#include "boxes.h"
#include "bits/stdc++.h"

using namespace std;
#define ll long long

int f(int n, int k){
    return (n+k-1) / k;
}
long long delivery(int n, int k, int l, int p[]) {
    ll answer = f(n, k) * 1LL * l;
    vector<int> arr(n+2);
    for (int i = 1; i <= n; i++)
        arr[i] = p[i-1];
 	arr[n+1] = l;
    vector<ll> pref(n+2), suf(n+2);
    for (int i = 1; i <= n; i++){
        pref[i] = arr[i];
        if (i >= k)
            pref[i] += pref[i-k];
    }
    for (int i = n; i >= 1; i--){
        suf[i] = l - arr[i];
        if (i + k <= n+1)
            suf[i] += suf[i+k];
    }
    for (int i = 0; i <= n; i++){
        answer = min(answer, 2*(pref[i] + suf[i+1]));
        if (i+k <= n+1)
            answer = min(answer, l + 2*(pref[i] + suf[i+k]));
    }
    return answer;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:13:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   13 |     for (int i = 1; i <= n; i++)
      |     ^~~
boxes.cpp:15:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   15 |   arr[n+1] = l;
      |   ^~~

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