Submission #1037999

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037999		vjudge1	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	46 ms	8540 KiB

railroad

#include "railroad.h"

#include<bits/stdc++.h>
using namespace std;

using lint=long long;

lint plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = (int) s.size();
    if(n<=16){
        lint dp[1<<n][n];
        for(int i=0;i<1<<n;i++){
            for(int j=0;j<n;j++){
                dp[i][j]=LLONG_MAX;
            }
        }
        for(int i=0;i<n;i++){
            dp[1<<i][i]=0;
        }
        for(int mask=1;mask<1<<n;mask++){
            for(int i=0;i<n;i++){
                if((mask>>i)&1){
                    for(int j=0;j<n;j++){
                        if(!((mask>>j)&1)){
                            int to=mask|(1<<j);
                            lint cost=t[i]-s[j];
                            if(cost<0)cost=0;
                            if(dp[mask][i]+cost<dp[to][j]){
                                dp[to][j]=dp[mask][i]+cost;
                            }
                        }
                    }
                }
            }
        }
        lint ans=LLONG_MAX;
        for(int i=0;i<n;i++){
            if(dp[(1<<n)-1][i]<ans){
                ans=dp[(1<<n)-1][i];
            }
        }
        return ans;
    }
    return 0;
}

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