Submission #30551

#	Time	Username	Problem	Language	Result	Execution time	Memory
30551		kavun	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	584 ms	170972 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#define pb push_back

using namespace std;
typedef long long ll;
long long n,l,k,ans = 1e18;
vector <ll> lft,rgt;


long long delivery(int N, int K, int L, int p[]) {
  n = N;
  k = K;
  for(int i = 0; i < n; i++)
    {
      if(p[i] <= L/2)
	lft.push_back(p[i]*2);
      else 
	rgt.push_back(2*(L-p[i]));
    }
  reverse(rgt.begin(),rgt.end());
  for(int i = k; i < lft.size(); i++)
    lft[i] = lft[i-k] + lft[i];
  for(int i = k; i < rgt.size(); i++)
    rgt[i] = rgt[i-k] + rgt[i];
  for(int i = 0; i <= k; i++)
    {
      int x = i;
      int y = k-i;
      ans = min(ans, (x < lft.size() ? lft[lft.size() - 1 - x] : 0) + (y < rgt.size() ?  rgt[rgt.size() - 1 - y] : 0) + L);
    }
  return min(ans, (lft.size() ? lft.back() : 0) + (rgt.size() ? rgt.back() : 0));
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:22:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   for(int i = k; i < lft.size(); i++)
               ^
boxes.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = k; i < lft.size(); i++)
                  ~~^~~~~~~~~~~~
boxes.cpp:24:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   for(int i = k; i < rgt.size(); i++)
               ^
boxes.cpp:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = k; i < rgt.size(); i++)
                  ~~^~~~~~~~~~~~
boxes.cpp:29:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
       int y = k-i;
               ~^~
boxes.cpp:30:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       ans = min(ans, (x < lft.size() ? lft[lft.size() - 1 - x] : 0) + (y < rgt.size() ?  rgt[rgt.size() - 1 - y] : 0) + L);
                       ~~^~~~~~~~~~~~
boxes.cpp:30:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       ans = min(ans, (x < lft.size() ? lft[lft.size() - 1 - x] : 0) + (y < rgt.size() ?  rgt[rgt.size() - 1 - y] : 0) + L);
                                                                        ~~^~~~~~~~~~~~

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