Submission #797448

#	Time	Username	Problem	Language	Result	Execution time	Memory
797448		QwertyPi	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	68 ms	12068 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
#define fi first
#define se second
using namespace std;

long long dp[200011];

int f(int a, int b){
	return max(0, a - b);
}

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int) s.size();
    vector<pair<int, int>> S, T;
    for(int i = 0; i < n; i++){
    	S.push_back({s[i], i});
	}
	for(int i = 0; i < n; i++){
		T.push_back({t[i], i});
	}
	sort(S.begin(), S.end());
	sort(T.begin(), T.end());
	fill(dp + 1, dp + n + 1, 1LL << 60);
	for(int i = 0; i < n; i++){
		if(S[i].se != T[i].se) dp[i + 1] = min(dp[i + 1], dp[i] + f(S[i].fi, T[i].fi));
		if(i > 0 && S[i].se != T[i - 1].se && S[i - 1].se != T[i].se) dp[i + 1] = min(dp[i + 1], dp[i - 1] + f(S[i].fi, T[i - 1].fi) + f(S[i - 1].fi, T[i].fi));
	}
    return dp[n];
}

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