Submission #427714

#	Time	Username	Problem	Language	Result	Execution time	Memory
427714		Dan4Life	Boxes with souvenirs (IOI15_boxes)	C++17	35 / 100	221 ms	300 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll delivery(int n, int k, int l, int a[])
{
    if(n<=10)
    {
        ll ans = 100000000000;
        vector<int> v; v.clear();
        for(int i = 0; i < n; i++) v.push_back(a[i]);
        do
        {
            ll sum = 0; int cur = 0;
            for(int i = 0; i < n; i++)
            {
                sum+=min(abs(cur-v[i]), l-abs(cur-v[i])), cur = v[i];
                if(i%k==k-1) sum+=min(cur, l-cur), cur = 0;
            }
            sum+=min(cur, l-cur), ans = min(ans, sum);
        }while(next_permutation(v.begin(), v.end()));
        return ans;
    }
    else if(k==1){
        ll ans = 0;
        for(int i = 0; i < n; i++) ans+=min((ll)a[i], (ll)l-a[i]);
        return ans*2;
    }
    else if(k==n){
        ll ans = min({l, a[n-1]*2, (l-a[0])*2});
        for(int i = 0; i < n-1; i++)
            ans = min(ans, (ll)(a[i]+(l-a[i+1]))*2ll),
            ans = min(ans, (ll)(a[i-1]+(l-a[i]))*2ll);
        return ans;
    }
    else {
        ll ans = 0ll; int cur = 0;
        int cnt = k, i = 0, j = 0;
        for(i = 0; i < n; i++)
        {
            if(a[i]>l/2)break;
            if(cnt==0) ans+=cur, cur = 0, cnt = k;
            ans+=abs(cur-a[i]), cur = a[i];
            if(cur==0) cnt = k+1; cnt--;
        }
        for(j = i; j < n; j++)
        {
            if(cnt==0)break;
            ans+=abs(a[j]-cur), cur = a[j];
            cnt--;
        }
        ans+=min(cur, l-cur);
        cnt = k;
        for(int i = n-1; i>=j; i--)
        {
            if(cnt==0) ans+=l-cur, cur = 0, cnt = k;
            ans+=abs(cur-a[i]), cur = a[i];
            if(cur==0) cnt = k+1; cnt--;
        }
        ans+=min(cur, l-cur);
        return ans;
    }
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:44:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   44 |             if(cur==0) cnt = k+1; cnt--;
      |             ^~
boxes.cpp:44:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   44 |             if(cur==0) cnt = k+1; cnt--;
      |                                   ^~~
boxes.cpp:54:17: warning: declaration of 'i' shadows a previous local [-Wshadow]
   54 |         for(int i = n-1; i>=j; i--)
      |                 ^
boxes.cpp:38:22: note: shadowed declaration is here
   38 |         int cnt = k, i = 0, j = 0;
      |                      ^
boxes.cpp:58:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   58 |             if(cur==0) cnt = k+1; cnt--;
      |             ^~
boxes.cpp:58:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   58 |             if(cur==0) cnt = k+1; cnt--;
      |                                   ^~~

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