#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#define out(x) "{" << (#x) << ": " << x << "} "
long long delivery(int N, int K, int L, ll p[]) {
ll l = 0, r = N - 1;
long long ret = 0;
ll k = K;
while(true) {
if(r - l + 1 <= k) {
ll curr = min((ll)L, min(2 * L - 2 * p[l], 2 * p[r]));
for(ll i = l; i <= r - 1; i ++) {
if(p[i] <= L / 2 && p[i + 1] >= (L + 1) / 2) {
chkmin(curr, p[i] * 2ll + 2ll * L - 2ll * p[i + 1]);
}
}
ret += curr;
break;
}
if(min(2ll * (L - p[r - k + 1]), (ll)L) < min(2ll * p[l + k - 1], (ll)L)) {
ret += min(2ll * (L - p[r - k + 1]), (ll)L);
r -= k;
} else {
ret += min(2ll * p[l + k - 1], (ll)L);
l += k;
}
}
return ret;
}
Compilation message
/tmp/ccD7jx8i.o: In function `main':
grader.c:(.text.startup+0x1b4): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status
