Submission #410975

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
410975	2021-05-24 02:38:26	Kevin_Zhang_TW	Ancient Books (IOI17_books)	C++17	100 / 100	134 ms	14916 KiB

books

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
void debug(auto l, auto r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
#include "books.h"
long long minimum_walk(std::vector<int> p, int s) {
  int n = p.size();
  ll res = 0;
  for (int i = 0;i < n;++i)
    res += abs(i - p[i]);
  if (res == 0) return 0;
  int L = 0, R = n-1;
  while (p[L] == L) ++L;
  while (p[R] == R) --R;
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 10 / 10
• Subtask 3: 28 / 28
• Subtask 4: 20 / 20
• Subtask 5: 30 / 30