Submission #729044

#	Time	Username	Problem	Language	Result	Execution time	Memory
729044		grogu	Roller Coaster Railroad (IOI16_railroad)	C++14	11 / 100	2067 ms	12024 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
#define endl '\n'
#define here cerr<<"=========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#define ll long long
#define pb push_back
#define popb pop_back
#define all(a_) a_.begin(),a_.end()
#define pll pair<ll,ll>
#define sc second
#define fi first
#define llinf 1000000000000000LL
using namespace std;
#define maxn 200005
ll n;
pll a[maxn];
long long plan_roller_coaster(vector<int> s, vector<int> t) {
    n = s.size();
    for(ll i = 1;i<=n;i++) a[i] = {t[i-1],s[i-1]};
    if(n<=8){
        vector<ll> v(n);
        iota(all(v),1);
        ll ans = llinf;
        do{
            ll cur = 0;
            for(ll i = 0;i<v.size()-1;i++){
                cur += max(0LL,a[v[i]].fi-a[v[i+1]].sc);
            }
            ans = min(ans,cur);
        }while(next_permutation(all(v)));
        return ans;
    }
}
/**
4
1 7
4 3
5 8
6 6
**/

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:27:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |             for(ll i = 0;i<v.size()-1;i++){
      |                          ~^~~~~~~~~~~
railroad.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type]
   34 | }
      | ^

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