Submission #379961

#	Time	Username	Problem	Language	Result	Execution time	Memory
379961		Pichon5	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	126 ms	73452 KiB

railroad

#include "railroad.h"
#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
//salida rapida "\n"
//DECIMALES fixed<<sp(n)<<x<<endl;
//gcd(a,b)= ax + by
//lCB x&-x
//set.erase(it) - ersases the element present at the required index//auto it = s.find(element)
//set.find(element) - iterator pointing to the given element if it is present else return pointer pointing to set.end()
//set.lower_bound(element) - iterator pointing to element greater than or equal to the given element
//set.upper_bound(element) - iterator pointing to element greater than the given element
// | ^
//__builtin_popcount(x)
using namespace std;
ll dp[200000][20];//subset y anterior
vi S,T;
int n;
ll f(int m, int ant,int pos){
    if(pos==n){
        return 0ll;
    }
    if(dp[m][ant]!=-1){
        return dp[m][ant];
    }
    dp[m][ant]=1e18;
    if(pos==0){
        for(int i=0;i<n;i++){
            dp[m][ant]=min(dp[m][ant],f((1<<i),i,pos+1));
        }
    }else{
        for(int i=0;i<n;i++){
            if((1<<i)&m){continue;}
            int aux=max((T[ant]-S[i]),0);
            dp[m][ant]=min(dp[m][ant],f(m+(1<<i),i,pos+1)+aux);
        }
    }
    return dp[m][ant];
}
long long plan_roller_coaster(vector<int> s,vector<int> t) {
    n = (int) s.size();
    S=s;T=t;
    for(int i=0;i<200000;i++){
        for(int l=0;l<20;l++){
            dp[i][l]=-1;
        }
    }
    return f(0,0,0);
    return 0;
}
// 4 1 7 4 3 5 8 6 6

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