Submission #408675

#	Time	Username	Problem	Language	Result	Execution time	Memory
408675		sad	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	100 ms	43972 KiB

railroad

#include<bits/stdc++.h>
#include "railroad.h"
#define ll long long
#define fi first
#define se second
#define pb push_back
using namespace std;
int n;const int M=100000;
int S[20],T[20];
ll dp[M][21];
ll go(int x,int y)
{
    if(x>n-1)return 0;
    ll z=0;
    if(T[x]<=S[y])return 0;
    z=T[x]-S[y];return z;
}
ll d(int x,int mask,int last)
{
    if(x==n)return 0;
    ll &u=dp[mask][last];
    if(u!=-1)return u;
    u=1e17;ll one=1;
    for(int i=0;i<n;i++)
    {
        ll w=(one<<i);
        if((mask&w)>0)continue;
        ll z=go(last,i);
        u=min(u,d(x+1,mask+w,i)+z);
    }
    return u;
}
long long plan_roller_coaster(vector<int> s,vector<int> t) {
    memset(dp,-1,sizeof dp);
    n = (int) s.size();
    for(int i=0;i<n;i++)
    {
        S[i]=s[i];
        T[i]=t[i];
    }
    ll x=d(0,0,n+2);
    return x;
}

• Subtask 1: 11 / 11
• Subtask 2: 23 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36