Submission #248440

#	Time	Username	Problem	Language	Result	Execution time	Memory
248440		Evirir	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	591 ms	293984 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#define watch(x) cout<<(#x)<<"="<<(x)<<'\n'
#define mset(d,val) memset(d,val,sizeof(d))
#define setp(x) cout<<fixed<<setprecision(x)
#define forn(i,a,b) for(int i=(a);i<(b);i++)
#define fore(i,a,b) for(int i=(a);i<=(b);i++)
#define pb push_back
#define F first
#define S second
#define pqueue priority_queue
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef vector<ii> vii;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
void amin(ll &a, ll b){ a=min(a,b); }
void amax(ll &a, ll b){ a=max(a,b); }
void YES(){cout<<"YES\n";} void NO(){cout<<"NO\n";}
void SD(int t=0){ cout<<"PASSED "<<t<<endl; }
const ll INF = ll(1e18);
const int MOD = 998244353;

bool DEBUG = 0;
const int MAXN = 10000005;

ll delivery(int n, int K, int L, int a[])
{
	ll l[n]{}, r[n]{};
	
	forn(i,0,n){
		l[i]=a[i];
		if(i-K>=0) l[i]+=l[i-K]+min(a[i],L-a[i]);
		else l[i]+=min(a[i],L-a[i]);
	}
	for(int i=n-1;i>=0;i--){
		r[i]=L-a[i];
		if(i+K<n) r[i]+=r[i+K]+min(a[i],L-a[i]);
		else r[i]+=min(a[i],L-a[i]);
	}
	
	ll ans=INF;
	amin(ans, r[0]);
	if(DEBUG) cout<<"i="<<0<<" cur="<<r[0]<<" ans="<<ans<<'\n';
	forn(i,0,n-1){
		ans = min(ans, l[i]+r[i+1]);
		if(DEBUG) cout<<"i="<<i+1<<" l="<<l[i]<<" r="<<r[i+1]<<" cur="<<l[i]+r[i+1]<<" ans="<<ans<<'\n';
	}
	amin(ans, l[n-1]);
	if(DEBUG) cout<<"i="<<n<<" cur="<<l[n-1]<<" ans="<<ans<<'\n';
	
    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