Submission #775876

#	Time	Username	Problem	Language	Result	Execution time	Memory
775876		peteza	Ancient Books (IOI17_books)	C++14	0 / 100	1 ms	212 KiB

books

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

long long minimum_walk(std::vector<int> p, int s) {
    int cur = 0;
    std::vector<bool> vis(p.size(), 0);
    long long cans = 0;
    for(int i=0;i<p.size();i++) {
        if(vis[i] || p[i] == i) continue;
        cur = i;
        int x = p[i]; vis[i] = 1;
        long long csum = llabs(i-p[i]);
        while(x != i) {
            vis[x] = 1;
            csum += llabs(x-p[x]);
            x = p[x];
        }
        cans += csum;
    }
	return cans + 2*cur;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:8:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i=0;i<p.size();i++) {
      |                 ~^~~~~~~~~

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