Submission #392461

#	Time	Username	Problem	Language	Result	Execution time	Memory
392461		my99n	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	1 ms	332 KiB

boxes

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

long long cwtour[1000100], cwwtour[1000100];
long long delivery(int N, int K, int L, int p[]) {
  int dis = 0;
  for (int i = 1; i <= N; i++) cwtour[i] = p[i-1] + cwtour[max(0,i-K)];
  for (int i = N; i >= 1; i--) cwwtour[i] = L-p[i-1] + cwwtour[i+K>N?0:i+K];


  long long ans = 1e18;
  for (int i = 1; i <= N; i++) {
    if (i+1 <= N)
    ans = min(ans, 2*cwtour[i]+2*cwwtour[i+1]);
    if (i+K+1 <= N)
    ans = min(ans, 2*cwtour[i]+2*cwwtour[i+K+1]+L);
  }
  return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:7:7: warning: unused variable 'dis' [-Wunused-variable]
    7 |   int dis = 0;
      |       ^~~

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