Submission #715885

#	Time	Username	Problem	Language	Result	Execution time	Memory
715885		mdub	Gondola (IOI14_gondola)	C++14	25 / 100	29 ms	4984 KiB

gondola

#include <bits/stdc++.h>
#include "gondola.h"
using namespace std;
 
int valid(int n, int  inputSeq[]) {
  for (int i = 0; i < n; i++) {
    inputSeq[i]--;
  }
  pair<int, int> smallest = {1e9, -1};
  for (int i = 0; i < n; i++) {
    if (inputSeq[i] < smallest.first) {
      smallest = {inputSeq[i], i};
    }
  }
  set<int> seen;
  if (smallest.first >= n) smallest.first = 0;
  int next = smallest.first;
  for (int i = smallest.second; i < n + smallest.second; i++) {
    if (inputSeq[i % n] != next && (seen.count(inputSeq[i % n]) || inputSeq[i % n] < n)) {
	return 0;
    }
    next = (next + 1) % n;
    seen.insert(inputSeq[i % n]);
  }
  return 1;
}
 
int replacement(int n, int gondolaSeq[], int replacementSeq[])
{ 
	vector<int> positions(n);
	int temp = -1;
	for (int i = 0; i < n; i++) {
		if (gondolaSeq[i] <= n) {
			temp = i;
		}
	}
	if (temp == -1) {
		for (int i = 0; i < n; i++) {
			positions[i] = i + 1;
		}
	}
	else {
		int cur = gondolaSeq[temp];
		for (int i = temp; i < n; i++) {
			positions[i] = cur;
			cur++;
			if (cur > n) cur = 1;
		}
		for (int i = 0; i < temp; i++) {
			positions[i] = cur;
			cur++;
			if (cur > n) cur = 1;
		}
	}
	priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;
	for (int i = 0; i < n; i++) {
		pq.push({gondolaSeq[i], i});
	}
	int iRep = 0;
	int cur = n + 1;
	while (!pq.empty()) {
	    if (pq.top().first != positions[pq.top().second]){
    		replacementSeq[iRep] = positions[pq.top().second];
    		iRep++;
	    }

		while (cur < gondolaSeq[pq.top().second]) {
			replacementSeq[iRep] = cur;
			iRep++;
			cur++;
		}
		pq.pop();
	
	}
	return iRep;
}


int countReplacement(int n, int inputSeq[])
{return 0;}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 20
• Subtask 7: 0 / 5
• Subtask 8: 0 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10