Submission #783319

#	Time	Username	Problem	Language	Result	Execution time	Memory
783319		Matblube	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	727 ms	320960 KiB

boxes

#include "boxes.h"
#include <iostream>
#include <iomanip>
#include <string>
#include <math.h>
#include <algorithm>
#include <cstring>
#include <numeric>
#include <vector>
#include <map>
#include <set>
#include <deque>
#include <unordered_map>
#include <unordered_set>
using namespace std;
typedef long long ll;
#define dbg(x) cerr<<#x<<": "<<x<<"\n";
#define fr(i, x) for(ll i=0 ; i<x ; i++)
#define fra(x, v) for(auto x:v)
#define fra1(x,v) for(auto &x:v)
#define all(x) x.begin(), x.end()
#define allr(x) x.rbegin(), x.rend()
#define pb(x) push_back(x)
#define F first
#define S second
const ll maxN=1e7;
ll dp[maxN], dp1[maxN];

long long delivery(int N, int K, int L, int p[]) {
    ll n=N, k=K, l=L;
    vector<ll>v(n);
    fr(i, n) v[i]=p[i];
    deque<pair<ll, ll>>dq;
    dq.pb(make_pair(0, -1));
    for(ll i=0; i<n ; i++){
        if(dq.front().S==i-k-1) dq.pop_front();
        dp[i]+=(min(l, 2*v[i]))+dq.front().F;
        while(dq.size() && dq.front().F>=dp[i]) dq.pop_front();
        dq.pb(make_pair(dp[i], i));
    }
    while(dq.size()) dq.pop_back();
    dq.pb(make_pair(0, n));
    for(ll i=n-1 ; i>=0 ; i--){
        if(dq.front().S==i+k+1)dq.pop_front();
        dp1[i]+=(min(l, 2*(l-v[i])))+dq.front().F;
        while(dq.size() && dq.front().F>=dp1[i]) dq.pop_front();
        dq.pb(make_pair(dp1[i], i));
    }
//    fr(i, n) cout<<dp[i]<<" "<<dp1[i]<<"\n";
    ll ans=1e18;
    for(ll i=0 ; i<n ; i++){
        ans=min(ans, dp[i]+dp1[(i+1)%n]);
    }
    return min(ans, min(dp[n-1], dp1[0]));
}

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