Submission #1276143

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276143		quanduongxuan12	선물상자 (IOI15_boxes)	C++20	100 / 100	339 ms	196664 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
#define name "boxes"
#define MAXN 10000007
#define pb push_back
#define pf push_front
#define ll long long
#define ii pair<int, int>
#define fs first
#define sc second
#define ill pair<int, ll>
#define lli pair<ll, int>
#define llll pair<ll, ll>
#define all(v) v.begin(),v.end()
#define uni(v) v.erase(unique(all(v)),v.end())
#define bit(n,i) (((n)>>(i))&1)
#define FOR(i,a,b) for (int i=(a),_b=(b); i<=_b; i++)
#define FORD(i,a,b) for (int i=(a),_b=(b); i>=_b; i--)
#define MASK(i) (1LL<<(i))
const int INF=1e9;
const int MOD=1e9+7;
void add(int &u, int v){
    u+=v;
    if (u>=MOD) u-=MOD;
}
void sub(int &u, int v){
    u-=v;
    if (u<0) u+=MOD;
}
void minimize(ll &u, ll v){
    u=min(u,v);
}
void maximize(int &u, int v){
    u=max(u,v);
}
long long Rand(long long l, long long r){
    ll tmp=0;
    FOR(i,1,4) tmp=((tmp<<15)^(((1<<15)-1)&rand()));
    return l+tmp%(r-l+1);
}
ll dp[MAXN],dpd[MAXN];
ll delivery(int n, int k, int L, int positions[]){
    FOR(i,0,n-1){
        dp[i]=(i>=k?dp[i-k]:0LL)+1LL*2*positions[i];
    }
    FORD(i,n-1,0){
        dpd[i]=(i+k<=n-1?dpd[i+k]:0LL)+1LL*2*(L-positions[i]);
    }
    ll res=1e18;
    FOR(i,-1,n-1){
        ll x=(i==-1?0LL:dp[i]);
        ll y=(i==n-1?0LL:dpd[i+1]);
        minimize(res,x+y);
    }
    FOR(i,0,n-k){
        ll x=(i==0?0LL:dp[i-1]);
        ll y=(i+k-1==n-1?0LL:dpd[i+k]);
        minimize(res,x+y+1LL*L);
    }
    return res;
}

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