Submission #307692

#	Time	Username	Problem	Language	Result	Execution time	Memory
307692		kylych03	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	1172 ms	196436 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
//#include "grader.cpp"
//#define int long long
using namespace std;
long long pra[10000001], prb[10000001];
long long delivery(int n, int k, int l, int p[]) {

    long long K = k;
    long long L = l;
    long long N = n;
    vector <long long > a,b;
    sort(p, p+N);
    for(int  i = 0; i < N; i++){
        if(p[i] <= L/2)
            a.push_back(p[i]);
        else
            b.push_back(L-p[i]);
    }
    sort(b.begin(), b.end());
    long long res = 0;

    for(long long  i = 0 ; i < a.size();i++)
        if(i<K)
            pra[i] = a[i]*2;
        else
            pra[i] = a[i] * 2 + pra[i-K];

    for(int  i = 0 ; i < b.size();i++)
        if(i<K)
            prb[i] = b[i]*2;
        else
            prb[i] = b[i] * 2 + prb[i-K];

    if( a.size()==0)
    res = prb[b.size() -1 ];
    else
    if(b.size()==0)
    res = pra[a.size() -1 ];
    else
    res = pra[a.size() - 1] + prb[b.size() -1 ];
    long long x = 0;
    for(long long i  = a.size() - 2, j= 1; j <= K && i>=0 ; j++,i--){
        if(b.size() >= K - j)
            x = prb[b.size() - (K-j)-1];
        else
            x = 0;
        res = min (res, pra[i] + L + x);
    }
    if(K==N)
        res = min (res, L);
    return res;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:23:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(long long  i = 0 ; i < a.size();i++)
      |                            ~~^~~~~~~~~~
boxes.cpp:29:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for(int  i = 0 ; i < b.size();i++)
      |                      ~~^~~~~~~~~~
boxes.cpp:44:21: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   44 |         if(b.size() >= K - j)
      |            ~~~~~~~~~^~~~~~~~

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