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답안 #982307

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
982307 2024-05-14T06:27:56 Z Faisal_Saqib 철인 이종 경기 (APIO18_duathlon) C++17
31 / 100
 1000 ms 1048576 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+(100*(b+(100*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);
	}
	int mx=0;
	for(int i=1;i<=n;i++)
		mx=max(mx,deg[i]);
	if(n<=10)
	{
		for(int i=1;i<=n;i++)
		{
			path.push_back(i);
			full(i);
			path.pop_back();
		}
		ans=senpai.size();
		// 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 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2976 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 1 ms 2904 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 49 ms 2908 KB Output is correct
10 Execution timed out 1020 ms 3032 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 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2976 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 1 ms 2904 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 49 ms 2908 KB Output is correct
10 Execution timed out 1020 ms 3032 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 11600 KB Output is correct
2 Correct 32 ms 11600 KB Output is correct
3 Correct 31 ms 9052 KB Output is correct
4 Correct 34 ms 10228 KB Output is correct
5 Correct 34 ms 8284 KB Output is correct
6 Correct 29 ms 8436 KB Output is correct
7 Correct 26 ms 7772 KB Output is correct
8 Correct 27 ms 8236 KB Output is correct
9 Correct 26 ms 7192 KB Output is correct
10 Correct 27 ms 7772 KB Output is correct
11 Correct 27 ms 6748 KB Output is correct
12 Correct 22 ms 6748 KB Output is correct
13 Correct 21 ms 6744 KB Output is correct
14 Correct 22 ms 6492 KB Output is correct
15 Correct 15 ms 6236 KB Output is correct
16 Correct 16 ms 6236 KB Output is correct
17 Correct 2 ms 3672 KB Output is correct
18 Correct 2 ms 3676 KB Output is correct
19 Correct 2 ms 3676 KB Output is correct
20 Correct 2 ms 3676 KB Output is correct
21 Correct 2 ms 3676 KB Output is correct
22 Correct 2 ms 3676 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 1 ms 5208 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 4956 KB Output is correct
6 Correct 1 ms 4956 KB Output is correct
7 Correct 1 ms 2908 KB Output is correct
8 Correct 1 ms 4956 KB Output is correct
9 Correct 1 ms 4956 KB Output is correct
10 Correct 1 ms 4956 KB Output is correct
11 Correct 1 ms 4956 KB Output is correct
12 Correct 1 ms 4956 KB Output is correct
13 Correct 1 ms 4952 KB Output is correct
14 Correct 1 ms 4956 KB Output is correct
15 Correct 1 ms 4956 KB Output is correct
16 Correct 1 ms 4956 KB Output is correct
17 Correct 1 ms 4956 KB Output is correct
18 Correct 1 ms 5208 KB Output is correct
19 Correct 1 ms 4952 KB Output is correct
20 Correct 1 ms 4956 KB Output is correct

Subtask #5
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 9552 KB Output is correct
2 Correct 30 ms 9816 KB Output is correct
3 Correct 37 ms 9588 KB Output is correct
4 Correct 29 ms 9564 KB Output is correct
5 Correct 29 ms 9564 KB Output is correct
6 Correct 30 ms 9300 KB Output is correct
7 Correct 37 ms 12376 KB Output is correct
8 Correct 36 ms 11444 KB Output is correct
9 Correct 34 ms 10660 KB Output is correct
10 Correct 30 ms 9388 KB Output is correct
11 Correct 31 ms 9564 KB Output is correct
12 Correct 31 ms 9404 KB Output is correct
13 Correct 31 ms 9564 KB Output is correct
14 Correct 37 ms 9816 KB Output is correct
15 Correct 25 ms 9052 KB Output is correct
16 Correct 17 ms 8284 KB Output is correct
17 Correct 22 ms 9680 KB Output is correct
18 Correct 22 ms 9800 KB Output is correct
19 Correct 25 ms 9668 KB Output is correct
20 Correct 24 ms 9804 KB Output is correct

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 1 ms 4956 KB Output is correct
3 Runtime error 905 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 9556 KB Output is correct
2 Correct 39 ms 9556 KB Output is correct
3 Runtime error 682 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2976 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 1 ms 2904 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 49 ms 2908 KB Output is correct
10 Execution timed out 1020 ms 3032 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 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2976 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 1 ms 2904 KB Output is correct
8 Correct 2 ms 2908 KB Output is correct
9 Correct 49 ms 2908 KB Output is correct
10 Execution timed out 1020 ms 3032 KB Time limit exceeded
11 Halted 0 ms 0 KB -