Submission #49161

#	Time	Username	Problem	Language	Result	Execution time	Memory
49161		StainFizzy	Simurgh (IOI17_simurgh)	C++14	13 / 100	1052 ms	748 KiB

simurgh

#include "simurgh.h"
#include <bits/stdc++.h>
#define N 10
using namespace std;

int parent[N], Rank[N], mm, nn;

int Find(int x)
{
	if(parent[x] == x) return x;

	return parent[x] = Find(parent[x]);
}

void join(int a, int b)
{
	a = Find(a), b = Find(b);

	if(a == b) return;

	if(Rank[a] > Rank[b]) parent[b] = a;

	else if(Rank[a] < Rank[b]) parent[a] = b;

	else parent[a] = b, Rank[b] ++;
}

std::vector<int> find_roads(int n_, std::vector<int> u, std::vector<int> v)
{
	mm = u.size(), nn = n_;

	for(int mask = 0; mask < (1<<mm); mask ++)
	{
		vector<int> roads;

		for(int i = 0; i < mm; i++) if(mask & (1<<i)) roads.push_back(i);

		for(int i = 0; i < nn; i++) parent[i] = i, Rank[i] = 0;

		set<int> spower;

		for(auto x: roads)
		{
			join(u[x], v[x]);
		}

		for(int i = 0; i < nn; i++) spower.insert(Find(i));

		if(spower.size() == 1 && roads.size() == nn - 1)
		{
			int q =  count_common_roads(roads);

			if(q == nn - 1)
			{
				return roads;
			}
		}
	}	
}

Compilation message (stderr)

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:49:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(spower.size() == 1 && roads.size() == nn - 1)
                            ~~~~~~~~~~~~~^~~~~~~~~
simurgh.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 13 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30