Submission #54706

#	Time	Username	Problem	Language	Result	Execution time	Memory
54706		fallingstar	Ancient Books (IOI17_books)	C++14	50 / 100	202 ms	103112 KiB

books

#include "books.h"
#include <cassert>
#include <algorithm>

#define long long long

using namespace std;

long minimum_walk(std::vector<int> p, int s) {
    assert(s == 0);
	int n = p.size();
    while (n > 0 && p[n - 1] == n - 1) --n;
    int mx = 0; long ans = 0;
    for (int i = 0; i < n; ++i)
    {
        if (i > 0 && mx < i) ans += 2;
        mx = max(mx, p[i]);
        ans += abs(i - p[i]);
    }
    return ans;
}

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