#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> ii;
typedef vector<ii> vii;
typedef long double lld;
#define rep(i,a,b) for(ll i = a; i < b; i++)
#define per(i,a,b) for(ll i = a; i >= b; i--)
#define all(x) x.begin(),x.end()
#define sz(x) (ll)(x).size()
#define trav(a,x) for(auto a : x)
#define inf 1000000000000000000
long long delivery(int N, int K, int L, int p[]) {
ll best = inf,n = N,cur,res;
vi a;
rep(i,0,N) {
if (p[i] == 0) n--;
else a.push_back(p[i]);
}
rep(h,0,n+1) rep(v,0,n+1){
if (h+v > n) break;
ll l = n-h-v;
res = ((l+K-1)/K)*L;
cur = h-1;
while(cur >= 0){
res += a[cur]*2;
cur -= K;
}
cur = n-v;
while (cur < n){
res += (L-a[cur])*2;
cur += K;
}
best = min(best,res);
}
return best;
}
////grader////
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 c, x, s;
c = _read();
while (c <= 32) c = _read();
x = 0;
s = 1;
if (c == '-') {
s = -1;
c = _read();
}
while (c > 32) {
x *= 10;
x += c - '0';
c = _read();
}
if (s < 0) x = -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();
}
fprintf(_outputFile, "%lld\n", delivery(N, K, L, p));
return 0;
}
Compilation message
/tmp/ccH3tOhH.o: In function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'
/tmp/ccR2mpp2.o:boxes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
