Submission #297881

#	Time	Username	Problem	Language	Result	Execution time	Memory
297881		Dovran	Roller Coaster Railroad (IOI16_railroad)	C++11	0 / 100	2077 ms	9432 KiB

railroad

#include <bits/stdc++.h>
#define N 200009
#define ll long long
#define pii pair <ll, ll>
#define ff first
#define sz() size()
#define ss second
#define pb push_back

using namespace std;

ll n;
ll vis[N];
ll v[N];
pii p[N];
ll ans=0;

void f(int x){
	if(x==n){
		ll sum=0, y=1;
		for(int i=0; i<n; i++){
			if(y>p[v[i]].ff)
				sum+=y-p[v[i]].ff;
			y=p[v[i]].ss;
		}
		ans=min(ans, sum);
		return;
	}
	for(int i=0; i<n; i++){
		if(!vis[i]){
			vis[i]=1;
			v[x]=i;
			f(x+1);
			vis[i]=0;
		}
	}
}

ll plan_roller_coaster(vector<int>a, vector<int>b){
	n=a.size();
	for(int i=0; i<n; i++)
		p[i]={a[i], b[i]};
	f(0);
	return ans;
}

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