Submission #933832

#	Time	Username	Problem	Language	Result	Execution time	Memory
933832		1075508020060209tc	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	39 ms	11100 KiB

railroad

#include "railroad.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll lowbit(int x){return x&-x;}
ll dp[(1<<17)][20];
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = (int) s.size();
    for(int i=1;i<(1<<n);i++){
        for(int j=0;j<n;j++){
            dp[i][j]=1e16;
            if( ((i&(1<<j))==0)){continue;}
            if(__builtin_popcount(i)==1){
                dp[i][j]=0;
                continue;
            }
            for(int k=0;k<n;k++){
                if( !(i&(1<<k)) ){continue;}
                if(k==j){continue;}
                ll cst=dp[i^(1<<j)][k]+max(0,t[k]-s[j]);
                dp[i][j]=min(dp[i][j],cst);
            }
        }
    }
    long long ret=dp[(1<<n)-1][0];
    for(int j=0;j<n;j++){
        ret=min(ret,dp[(1<<n)-1][j]);
    }
    return ret;
}

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