Submission #250885

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
250885	2020-07-19 10:54:42	godwind	Gondola (IOI14_gondola)	C++14	Compilation error	0 ms	0 KiB

gondola

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#include <iostream>
#include <set>
using namespace std;
int valid(int n, int a[])
{
  set<int> diff;
  for (int i = 0; i < n; ++i) {
    if (a[i] < 1) return 0;
    diff.insert(a[i]);
  }
  if (diff.size() != n) return 0;
  int pos = -1;
  for (int i = 0; i < n; ++i) {
    if (a[i] <= n) {
      pos = i;
      break;
    }
  }
  if (pos == -1) return 1;
  pos = (pos - a[pos] + 1 + n) % n;
  for (int i = 0; i < n; ++i) {
    int need = i + 1;
    int p = (pos + i) % n;
    if (a[p] <= n && a[p] != need) return 0;
  }
  return 1;
}
 
 
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Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (diff.size() != n) return 0;
      ~~~~~~~~~~~~^~~~
/tmp/ccxBGJYx.o: In function `main':
grader.cpp:(.text.startup+0xc3): undefined reference to `countReplacement'
grader.cpp:(.text.startup+0xe2): undefined reference to `valid'
grader.cpp:(.text.startup+0x106): undefined reference to `replacement'
collect2: error: ld returned 1 exit status