Submission #132933

#	Time	Username	Problem	Language	Result	Execution time	Memory
132933		wzy	Roller Coaster Railroad (IOI16_railroad)	C++11	34 / 100	83 ms	12152 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll dp[1<<17][17];
vector<int> s , t;

long long plan_roller_coaster(std::vector<int> sx, std::vector<int> tx){
    int n = (int) sx.size();
    s = sx , t = tx;
    for(int i = 0 ; i < (1<<n) ; i ++){
    	for(int j = 0 ; j < n; j ++){
    		dp[i][j] = (ll) 1e18;
    	}
    }
    for(int i = 0 ; i < n;i ++){
    	dp[1<<i][i] = 0;
    }
    for(int i = 0 ; i < (1<<n) ; i ++){
    	for(int j = 0 ; j < n ; j ++){
    		if((1<<j) & i){
    			for(int k = 0 ; k < n ; k++){
    				if((1<<k) & (i^(1<<j))){
    					if(dp[i][j] > (dp[i^(1<<j)][k] + (ll)max(t[k] - s[j] , 0))){
    						dp[i][j] = min(dp[i][j] , dp[i^(1<<j)][k] + (ll)max(t[k] - s[j] , 0));
    					}    					
    				}
    			}
    		}
    	}
    }
    int L = (1<<n);
    L--;
    ll p = (ll) 1e18;
    for(int j = 0 ; j < n ; j ++){
    	p = min(p , dp[L][j]);
    }
    return p;
}

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