#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <algorithm>
#include <utility>
#include <vector>
#include <iostream>
//#include "boxes.h"
#define ll long long
#define ve vector
using namespace std;
int dst(int x, int L){
return min(x, L - x);
}
long long delivery(int N, int K, int L, int p[]) {
ve<ll> dpl(N), dpr(N);
int cnt = 1;
for(int i = 0; i < N; i++){
if(i - K >= 0)
dpl[i] = p[i] - p[i - K] + dpl[i - K];
else dpl[i] = p[i];
}
for(int i = N - 1; i >= 0; i--){
if(i + K < N)
dpr[i] = p[i + K] - p[i] + dpr[i + K];
else dpr[i] = L - p[i];
}
ll res = min(dpl[N - 1] + dst(p[N - 1], L), dpr[0] + dst(p[0], L));
for(int i = 0; i < N - 1; i++)
res = min(res, dpl[i] + dst(p[i], L) + dpr[i + 1] + dst(p[i + 1], L));
return res;
}
static char _buffer[1024];
static int _currentChar = 0;
static int _charsNumber = 0;
static FILE *_inputFile, *_outputFile;
static inline int _read() {
if (_charsNumber < 0) {
exit(1);
}
if (!_charsNumber || _currentChar == _charsNumber) {
_charsNumber = (int)fread(_buffer, sizeof(_buffer[0]), sizeof(_buffer), _inputFile);
_currentChar = 0;
}
if (_charsNumber <= 0) {
return -1;
}
return _buffer[_currentChar++];
}
static inline int _readInt() {
int x;
std::cin >> x;
return x;
}
int main() {
_inputFile = fopen("boxes.in", "rb");
_outputFile = fopen("boxes.out", "w");
int N, K, L, i;
N = _readInt();
K = _readInt();
L = _readInt();
int *p = (int*)malloc(sizeof(int) * (unsigned int)N);
for (i = 0; i < N; i++) {
p[i] = _readInt();
}
cout << delivery(N, K, L, p);
return 0;
}
Compilation message
boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:22:9: warning: unused variable 'cnt' [-Wunused-variable]
22 | int cnt = 1;
| ^~~
/usr/bin/ld: /tmp/cc4cbLn1.o: in function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'; /tmp/cc6SZav2.o:boxes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
