Submission #429094

#	Time	Username	Problem	Language	Result	Execution time	Memory
429094		LouayFarah	Roller Coaster Railroad (IOI16_railroad)	C++14	11 / 100	2064 ms	5556 KiB

railroad

#include "bits/stdc++.h"
#include "railroad.h"
using namespace std;

#define pb push_back
#define mp make_pair
#define fi first
#define se second

long long plan_roller_coaster(vector<int> s, vector<int> t)
{
    int n = (int)s.size();

    if(n<=16)
    {
        vector<int> pos(n);
        for(int i = 0; i<n; i++)
            pos[i] = i;

        long long res = 1e18;
        do
        {
            int speed = 1;
            long long curr = 0;
            for(int i = 0; i<n; i++)
            {
                if(speed>s[pos[i]])
                    curr+=speed-s[pos[i]];
                speed = t[pos[i]];
            }
            res = min(res, curr);
        }while(next_permutation(pos.begin(), pos.end()));
        return res;
    }

    vector<pair<int, int>> p;
    for(int i =0; i<n;i++)
        p.pb(mp(t[i], s[i]));
    sort(p.begin(), p.end());

    long long res = 1;
    int speed = 1;
    for(int i = 0; i<n; i++)
    {
        if(speed>p[i].se)
        {
            res = 0;
            break;
        }
        speed = p[i].fi;
    }

    return res;
}

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