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답안 #982308

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
982308 2024-05-14T06:29:41 Z Faisal_Saqib 철인 이종 경기 (APIO18_duathlon) C++17
0 / 100
 1000 ms 72904 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ll long long
const int N=1e5+10;
vector<int> ma[N];
// ll pre[N];
bool vis[N];
ll ans=0,sz[N],dp[N],dp_[N];
void dfs(int x,int p=-1)
{
	sz[x]=1;
	vis[x]=1;
	for(auto y:ma[x])
	{
		if(y!=p)
		{
			dfs(y,x);
			sz[x]+=sz[y];
			dp[x]-=(sz[y]*sz[y]);
		}
	}
	dp[x]+=((sz[x]-1)*(sz[x]-1));
}
void ChangeRoot(int x,int y)
{
	// 
	dp[x]+=(sz[y]*sz[y]);
	dp[x]-=((sz[x]-1)*(sz[x]-1));
	dp[y]-=((sz[y]-1)*(sz[y]-1));
	sz[x]-=sz[y];
	sz[y]+=sz[x];
	dp[x]+=((sz[x]-1)*(sz[x]-1));
	dp[y]+=((sz[y]-1)*(sz[y]-1));
	dp[y]-=(sz[x]*sz[x]);
}
void dfs_(int x,int p=-1)
{
	vis[x]=1;
	ans+=dp[x];
	for(auto y:ma[x])
	{
		if(y!=p)
		{			
			ChangeRoot(x,y);
			dfs_(y,x);
			ChangeRoot(y,x);
		}
	}
}
bool cycle=0;
int nodes=0;
void _dfs(int x,int p=-1)
{
	vis[x]=1;
	nodes++;
	for(auto y:ma[x])
	{
		if(y!=p)
		{
			if(vis[y])
			{
				cycle=1;
			}
			else
			{
				_dfs(y,x);
			}
		}
	}
}
int f_cyc(int x)
{
	return (x*(x-1)*(x-2));
}
// int f_lin(int x)
// {
// 	ll cur=(x-1)*(x-1)*(x-1);
// 	return cur-(pre[x-1]);
// }
int f_lin_brute(int x)
{
	ll ans=0;
	ll sp=(x-1)*(x-1);
	for(int j=1;j<=x;j++)
		ans+=(sp-((j-1)*(j-1))-((x-j)*(x-j)));
	return ans;
}
set<int> senpai;
vector<int> path;
ll make_one(ll&a,ll&b,ll&c)
{
	return (a+(11*(b+(11*c))));
}
void full(int x)
{
	vis[x]=1;
	for(auto y:ma[x])
	{
		if(!vis[y])
		{
			path.push_back(y);
			full(y);
			path.pop_back();
		}
	}
	for(int j=1;(j+1)<path.size();j++)
		senpai.insert(make_one(path[0],path[j],path.back()));
	vis[x]=0;
}
void solve()
{
	// int n,m;
	// cin>>n;
	// // m=n-1;
	int n,m;
	cin>>n>>m;
	vector<int> deg(n+2);
	for(int i=0;i<m;i++)
	{
		int x=i+1,y=i+2;
		cin>>x>>y;
		deg[x]++;
		deg[y]++;
		ma[x].push_back(y);
		ma[y].push_back(x);
	}
		for(int i=1;i<=n;i++)
		{
			path.push_back(i);
			full(i);
			path.pop_back();
		}
		ans=senpai.size();
	// int mx=0;
	// for(int i=1;i<=n;i++)
	// 	mx=max(mx,deg[i]);
	// if(n<=10)
	// {
	// 	// return;
	// }
	// else if(mx<=2)
	// {
	// 	// Solve a Cycle or a Path
	// 	for(int i=1;i<=n;i++)
	// 	{
	// 		if(!vis[i])
	// 		{
	// 			cycle=0;
	// 			nodes=0;
	// 			_dfs(i);
	// 			if(cycle)
	// 			{
	// 				ans+=f_cyc(nodes);
	// 			}
	// 			else
	// 			{
	// 				ans+=f_lin_brute(nodes);
	// 			}
	// 		}
	// 	}
	// }
	// else
	// {
	// 	// Solve on Tree	
	// 	for(int i=1;i<=n;i++)
	// 	{
	// 		if(!vis[i])
	// 		{
	// 			dfs(i);
	// 		}
	// 	}
	// 	for(int i=1;i<=n;i++)
	// 		vis[i]=0;
	// 	for(int i=1;i<=n;i++)
	// 	{
	// 		if(!vis[i])
	// 		{
	// 			dfs_(i);
	// 		}
	// 	}
	// }
	cout<<ans<<endl;
}
signed main()
{
  cin.tie(0);
  cout.tie(0);
  ios::sync_with_stdio(0);
  // pre[0]=0;
  // ll asp=1e5+1;
  // for(int i=1;i<=asp;i++)
  // 	pre[i]=pre[i-1]+(i*i);
  solve();
}

Compilation message

count_triplets.cpp: In function 'void full(long long int)':
count_triplets.cpp:107:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |  for(int j=1;(j+1)<path.size();j++)
      |              ~~~~~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 45 ms 2908 KB Output is correct
10 Execution timed out 1035 ms 2904 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 45 ms 2908 KB Output is correct
10 Execution timed out 1035 ms 2904 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1055 ms 72904 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1012 ms 9460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1089 ms 53680 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1022 ms 9300 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1032 ms 49384 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 45 ms 2908 KB Output is correct
10 Execution timed out 1035 ms 2904 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2904 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 2 ms 2908 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 45 ms 2908 KB Output is correct
10 Execution timed out 1035 ms 2904 KB Time limit exceeded
11 Halted 0 ms 0 KB -