제출 #71801

#제출 시각아이디문제언어결과실행 시간메모리
71801nirshalmonAncient Books (IOI17_books)C++14
0 / 100
3 ms536 KiB
#include "books.h"
#include<bits/stdc++.h>

using namespace std;

long long minimum_walk(std::vector<int> p, int s) {
	long long base = -2;
	int mx = -1;
	int f = 0, l = p.size() - 1;
	for (; f < p.size(); ++f) {
		if (p[f] != f) break;
	}
	for (; l >= 0; --l) {
		if (p[l] != l) break;
	}
	if (l == 0) return 0;
	for (int i = f; i <= l; ++i) {
		base += abs(p[i] - i);
		mx = max(p[i], i);
		if (mx <= i) base += 2;
	}
	if (s < f) base += 2 * (f - s);
	if (s > l) base += 2 * (s - l);
	return base;
}

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:10:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (; f < p.size(); ++f) {
         ~~^~~~~~~~~~
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