제출 #253864

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
253864	2020-07-29 00:13:54	ChrisT	곤돌라 (IOI14_gondola)	C++17	100 / 100	67 ms	6008 KiB

gondola

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#include<bits/stdc++.h>
using namespace std;
#include "gondola.h"
const int MOD = 1e9 + 9;
int valid (int n, int *a) {
  set<int> seen;
  for (int i = 0; i < n; i++) {
    if (seen.count(a[i])) return 0;
    seen.insert(a[i]);
  }
  for (int i = 0; i < n; i++) {
    if (a[i] <= n) {
      for (int j = (i+1)%n, cur = a[i]%n+1; j != i; j = (j + 1) % n, cur = cur % n + 1) {
        if (a[j] <= n && a[j] != cur) return 0;
      }
      return 1;
    }
  }
  return 1;
} 
int replacement (int n, int *a, int *ret) {
  vector<int> pos(250001,-1), cur(n); int mx = 0;
  for (int i = 0; i < n; i++) if (a[i] <= n) {
    cur[i] = a[i];
    for (int j = (i+1)%n, go = a[i]%n+1; j != i; j = (j + 1) % n, go = go % n + 1) cur[j] = go;
    break;
  }
  if (!cur[0]) for (int i = 0; i < n; i++) cur[i] = i+1;
  for (int i = 0; i < n; i++) {
    pos[a[i]] = i;
 
 
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• Subtask 10: 10 / 10