Submission #836409

#	Time	Username	Problem	Language	Result	Execution time	Memory
836409		oscar1f	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	61 ms	8760 KiB

railroad

#include<bits/stdc++.h>
#include "railroad.h"

using namespace std;
using ll=long long;

const ll MAX_TRANSFO=16,INFINI=(ll)1000*1000*1000*1000*1000*1000;
ll nbTransfo;
ll memo[(1<<MAX_TRANSFO)][MAX_TRANSFO];
ll seuil[MAX_TRANSFO],valNouv[MAX_TRANSFO];

ll dyna(ll etat,ll dernPris) {
    if (etat==(1<<nbTransfo)-1) {
        return 0;
    }
    if (memo[etat][dernPris]!=INFINI) {
        return memo[etat][dernPris];
    }
    ll anci;
    if (etat==0) {
        anci=0;
    }
    else {
        anci=valNouv[dernPris];
    }
    //cout<<etat<<" "<<dernPris<<" "<<anci<<endl;
    for (ll i=0;i<nbTransfo;i++) {
        if ((etat>>i)%2==0) {
            memo[etat][dernPris]=min(memo[etat][dernPris],dyna(etat+(1<<i),i)+max(anci-seuil[i],(ll)0));
        }
    }
    return memo[etat][dernPris];
}

ll plan_roller_coaster(vector<int> s,vector<int> t) {
    nbTransfo=s.size();
    for (ll i=0;i<nbTransfo;i++) {
        seuil[i]=s[i];
        valNouv[i]=t[i];
    }
    for (int i=0;i<(1<<nbTransfo);i++) {
        for (int j=0;j<nbTransfo;j++) {
            memo[i][j]=INFINI;
        }
    }
    return dyna(0,0);
}

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