Submission #434906

#	Time	Username	Problem	Language	Result	Execution time	Memory
434906		jeqcho	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	595 ms	274304 KiB

boxes

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

typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pair<int,int>> vpi;

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

#define pb push_back
#define rsz resize
#define sz(x) int(x.size())
#define all(x) begin(x), end(x)
#define fi first
#define se second

int const N=1e7+3;
ll cw[N];
ll ccw[N];

ll delivery(int n, int K, int L1, int p1[]) {
	ll L=L1;
	vector<ll>p(n);
	F0R(i,n)p[i]=p1[i];
	cw[0]=0;
	FOR(i,1,n+1)
	{
		cw[i]=min(2*p[i-1],L);
		if(i>=K)cw[i]+=cw[i-K];
	}
	ccw[0]=0;
	FOR(i,1,n+1)
	{
		ccw[i]=min(2*(L-p[n-i]),L);
		if(i>=K)ccw[i]+=ccw[i-K];
	}
	ll ans=4e18;
	F0R(i,n+1)
	{
		ll cand=cw[i]+ccw[n-i];
		ans=min(ans,cand);
	}
	return ans;
}

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