Submission #626973

#	Time	Username	Problem	Language	Result	Execution time	Memory
626973		Trunkty	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	47 ms	13116 KiB

railroad

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long ll;
//#define int ll

#include "railroad.h"

ll dp[70005][25];

ll plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = s.size();
    for(int i=0;i<(1<<n);i++){
    	for(int j=0;j<n;j++){
    		dp[i][j] = 2e18;
		}
	}
	for(int i=1;i<(1<<n);i++){
		int cnt=0;
		for(int j=0;j<n;j++){
			if(i&(1<<j)){
				cnt++;
			}
		}
		if(cnt==1){
			for(int j=0;j<n;j++){
				if(i&(1<<j)){
					dp[i][j] = 0;
				}
			}
			continue;
		}
		for(int j=0;j<n;j++){
			if(i&(1<<j)){
				int p = i-(1<<j);
				for(int k=0;k<n;k++){
					if(p&(1<<k)){
						dp[i][j] = min(dp[i][j],dp[p][k]+max(0,t[k]-s[j]));
					}
				}
			}
		}
	}
	ll ans=2e18;
	for(int i=0;i<n;i++){
		ans = min(ans,dp[(1<<n)-1][i]);
	}
    return ans;
}

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