This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define fi first
#define se second
#define debug(x) cout << #x << " => " << x << "\n";
const int mod = 1e9 + 7;
int n, k, l, p[10000005], idx;
int le, ri;
ll dp[10000005][2];
ll ans;
ll delivery(int N, int K, int L, int P[]) {
n = N, k = K, l = L;
for(int i = 0; i < n; i++) {
if(P[i]) p[++idx] = P[i];
}
n = idx;
if(n == 0) return 0;
le = 0, ri = 1;
for(; ri <= n; ri++) {
dp[p[ri]][0] = 1;
}
// reverse(p + 1, p + n + 1);
// le = 0, ri = 1;
// for(; ri <= n; ri++) {
// while(ri - le > k && le < ri)
// le++;
// assert(p[ri] >= 0 && p[ri] < l && p[le] >= 0 && p[le] < l);
// dp[p[ri]][1] = dp[p[le]][1] + min(l, ((l - p[ri]) % l) * 2);
// }
// ans = min(dp[p[1]][0], dp[p[n]][1]);
// for(int i = 2; i <= n; i++) {
// assert(p[i] >= 0 && p[i] < l && p[i - 1] >= 0 && p[i - 1] < l);
// ans = min(ans, dp[p[i]][0] + dp[p[i - 1]][1]);
// }
return ans;
}
// 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 = stdin;
// _outputFile = stdout;
// 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;
// }
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