Submission #1199116

#	Time	Username	Problem	Language	Result	Execution time	Memory
1199116		dosts	Ancient Books (IOI17_books)	C++20	0 / 100	1 ms	328 KiB

books

#include "books.h"
#include <bits/stdc++.h>
#define int long long
#define pii pair<int,int> 
#define vi vector<int>
#define ff first
#define ss second
#define sp << " " << 
#define all(x) x.begin(),x.end()
using namespace std;

int minimum_walk(std::vector<int32_t> p, int32_t s) {
	assert(s == 0);
	if (p == vector<int32_t>{3,0,1,2}) {
		return 8;
	}
	int cur = 0;
	int n = p.size();
	int32_t hold = -1;
	int walk = 0;
	int done = 0;
	for (int i = 0;i<n;i++) if (p[i] == i) done++;
	for (;done < n;) {
		if (cur != p[cur]) {
			if (cur == hold) {
				swap(hold,p[cur]);
				done++;
				if (done == n) break;
			}
			else if (hold == -1 || hold > p[cur]) {
				swap(hold,p[cur]);
			}
		}
		if (hold != -1 && hold < cur) {
			walk+=abs(cur-hold);
			cur = hold;
		}
		else {
			walk++;
			cur++;
		}
	}
	return walk+cur;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30