Submission #135412

#	Time	Username	Problem	Language	Result	Execution time	Memory
135412		antimirage	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	124 ms	44228 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>

#define fr first
#define sc second
#define mk make_pair
#define pb push_back
#define all(s) s.begin(), s.end()

using namespace std;

int n;
long long dp[1 << 17][18], ans = 1e18;

long long plan_roller_coaster(vector <int> a, vector<int> b) {
	n = a.size();
	memset(dp, 0x3f3f3f3f, sizeof(dp));
	
	for (int i = 0; i < n; i++) {
		dp[1 << i][i] = 0;
	}
	
	for (int mask = 1; mask < (1 << n); mask++) {
		for (int last = 0; last < n; last++) {
			if ((mask>>last&1) == 0) continue;
			for (int j = 0; j < n; j++) {
				if (mask>>j&1) continue;
				dp[mask + (1 << j)][j] = min( dp[mask + (1 << j)][j], dp[mask][last] + max(0, b[last] - a[j]) );
			}
		}
	}
	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