Submission #1113012

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113012		SalihSahin	Ancient Books (IOI17_books)	C++14	12 / 100	1 ms	504 KiB

books

#include <bits/stdc++.h>
#define pb push_back
#include "books.h"
using namespace std;

long long minimum_walk(vector<int> p, int s) {
   long long ans = 0;
   int n = p.size();
   int mxs = 0;
   vector<int> vis(n);
   vector<array<int, 2> > cyc;
   for(int i = 0; i < n; i++){
      if(vis[i] || p[i] == i) continue;

      int l = i, r = i;

      int x = i;
      long long add = 0;
      while(!vis[x]){
         vis[x] = 1;
         add += abs(x - p[x]);
         x = p[x];
         r = max(r, x);
      }
      
      cyc.pb({l, r});
      ans += add;
   }

   int rval = 0;
   for(int i = 0; i < cyc.size(); i++){
      if(cyc[i][0] > rval) mxs = max(mxs, cyc[i][0]);
      rval = cyc[i][1];
   }

   ans += mxs*2;
   return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |    for(int i = 0; i < cyc.size(); i++){
      |                   ~~^~~~~~~~~~~~

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