Submission #114629

#	Time	Username	Problem	Language	Result	Execution time	Memory
114629		E869120	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	67 ms	9848 KiB

railroad

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

long long N, A[100009], B[100009], dp[1 << 16][17];

long long plan_roller_coaster(vector<int>s, vector<int>t) {
	N = s.size();
	for (int i = 0; i < N; i++) { A[i] = s[i]; B[i] = t[i]; }
	for (int i = 0; i < (1 << N); i++) { for (int j = 0; j <= N; j++) dp[i][j] = (1LL << 60); }
	
	dp[0][N] = 0; B[N] = 1;
	for (int i = 0; i < (1 << N); i++) {
		for (int j = 0; j <= N; j++) {
			if (dp[i][j] == (1LL << 60)) continue;
			for (int k = 0; k < N; k++) {
				if ((i & (1 << k)) != 0) continue;
				dp[i + (1 << k)][k] = min(dp[i + (1 << k)][k], dp[i][j] + max(0LL, B[j] - A[k]));
			}
		}
	}
    long long minx = (1LL << 60);
    for (int i = 0; i < N; i++) minx = min(minx, dp[(1 << N) - 1][i]);
    return minx;
}

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