Submission #766965

#	Time	Username	Problem	Language	Result	Execution time	Memory
766965		danikoynov	Ancient Books (IOI17_books)	C++14	12 / 100	1 ms	316 KiB

books

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

using namespace std;
typedef long long ll;

const int maxn = 1e6 + 10;
int used[maxn], n;
long long minimum_walk(vector<int> p, int s) {
    n = p.size();
    int cnt = 0;
    ll mx = 0, ans = 0;
    int to = 0;
    for (int i = 0; i < n; i ++)
    {
        if (p[i] == i)
            continue;
            ans = ans + (ll)abs(i - p[i]);
            ///cout << ans << endl;
        if (!used[i])
        {
                int local_max = i;
            int v = p[i];
            while(v != i)
            {

                local_max = max(local_max, v);
                used[v] = 1;
                v = p[v];
            }
            if (to < local_max)
                mx = i;
            to = max(to, local_max);
            used[v] = 1;
        }
    }
	return ans + 2 * mx;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:16:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   16 |         if (p[i] == i)
      |         ^~
books.cpp:18:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   18 |             ans = ans + (ll)abs(i - p[i]);
      |             ^~~
books.cpp:11:9: warning: unused variable 'cnt' [-Wunused-variable]
   11 |     int cnt = 0;
      |         ^~~

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