
"""simple docstring"""

import argparse
import os


SCREAMING_SNAKE_CASE_			    =  {
    '''pytorch''': {
        '''1.13''': {
            '''torch''': '''1.13.1''',
            '''torchvision''': '''0.14.1''',
            '''torchaudio''': '''0.13.1''',
            '''python''': 3.9,
            '''cuda''': '''cu116''',
            '''install''': (
                '''python3 -m pip install --no-cache-dir -U torch==1.13.1 torchvision==0.14.1 torchaudio==0.13.1'''
                ''' --extra-index-url https://download.pytorch.org/whl/cu116'''
            ),
            '''base_image''': '''nvidia/cuda:11.6.2-cudnn8-devel-ubuntu20.04''',
        },
        '''1.12''': {
            '''torch''': '''1.12.1''',
            '''torchvision''': '''0.13.1''',
            '''torchaudio''': '''0.12.1''',
            '''python''': 3.9,
            '''cuda''': '''cu113''',
            '''install''': (
                '''python3 -m pip install --no-cache-dir -U torch==1.12.1 torchvision==0.13.1 torchaudio==0.12.1'''
                ''' --extra-index-url https://download.pytorch.org/whl/cu113'''
            ),
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''1.11''': {
            '''torch''': '''1.11.0''',
            '''torchvision''': '''0.12.0''',
            '''torchaudio''': '''0.11.0''',
            '''python''': 3.9,
            '''cuda''': '''cu113''',
            '''install''': (
                '''python3 -m pip install --no-cache-dir -U torch==1.11.0 torchvision==0.12.0 torchaudio==0.11.0'''
                ''' --extra-index-url https://download.pytorch.org/whl/cu113'''
            ),
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''1.10''': {
            '''torch''': '''1.10.2''',
            '''torchvision''': '''0.11.3''',
            '''torchaudio''': '''0.10.2''',
            '''python''': 3.9,
            '''cuda''': '''cu113''',
            '''install''': (
                '''python3 -m pip install --no-cache-dir -U torch==1.10.2 torchvision==0.11.3 torchaudio==0.10.2'''
                ''' --extra-index-url https://download.pytorch.org/whl/cu113'''
            ),
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        # torchaudio < 0.10 has no CUDA-enabled binary distributions
        '''1.9''': {
            '''torch''': '''1.9.1''',
            '''torchvision''': '''0.10.1''',
            '''torchaudio''': '''0.9.1''',
            '''python''': 3.9,
            '''cuda''': '''cu111''',
            '''install''': (
                '''python3 -m pip install --no-cache-dir -U torch==1.9.1 torchvision==0.10.1 torchaudio==0.9.1'''
                ''' --extra-index-url https://download.pytorch.org/whl/cu111'''
            ),
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
    },
    '''tensorflow''': {
        '''2.11''': {
            '''tensorflow''': '''2.11.1''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.11.1''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.10''': {
            '''tensorflow''': '''2.10.1''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.10.1''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.9''': {
            '''tensorflow''': '''2.9.3''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.9.3''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.8''': {
            '''tensorflow''': '''2.8.2''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.8.2''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.7''': {
            '''tensorflow''': '''2.7.3''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.7.3''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.6''': {
            '''tensorflow''': '''2.6.5''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.6.5''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
        '''2.5''': {
            '''tensorflow''': '''2.5.3''',
            '''install''': '''python3 -m pip install --no-cache-dir -U tensorflow==2.5.3''',
            '''base_image''': '''nvidia/cuda:11.2.2-cudnn8-devel-ubuntu20.04''',
        },
    },
}


if __name__ == "__main__":
   SCREAMING_SNAKE_CASE_			    =  argparse.ArgumentParser('''Choose the framework and version to install''')
   parser.add_argument(
       '''--framework''', help='''The framework to install. Should be `torch` or `tensorflow`''', type=str, required=True
   )
   parser.add_argument('''--version''', help='''The version of the framework to install.''', type=str, required=True)
   SCREAMING_SNAKE_CASE_			    =  parser.parse_args()

   SCREAMING_SNAKE_CASE_			    =  past_versions_testing[args.framework][args.version]

   os.system(F'echo "export INSTALL_CMD=\'{info["install"]}\'" >> ~/.profile')
   print(F'echo "export INSTALL_CMD=\'{info["install"]}\'" >> ~/.profile')

   SCREAMING_SNAKE_CASE_			    =  ''''''
   if args.framework == "pytorch":
      SCREAMING_SNAKE_CASE_			    =  info['''cuda''']
   os.system(F'echo \"export CUDA=\'{cuda}\'\" >> ~/.profile')
   print(F'echo \"export CUDA=\'{cuda}\'\" >> ~/.profile')





"""simple docstring"""

from __future__ import annotations




def 			lowercase__  (    lowerCAmelCase :    Dict       )       ->					Optional[int]:






    """simple docstring"""




    global graph, reversed_graph, scc, component, visit, stack
    if visit[u]:
        return
    UpperCAmelCase  	=    True
    for v in graph[u]:
        dfs(lowerCAmelCase       )
    stack.append(lowerCAmelCase       )




def 			lowercase__  (    lowerCAmelCase :    Optional[int]       )       ->					int:






    """simple docstring"""




    global graph, reversed_graph, scc, component, visit, stack
    if visit[u]:
        return
    UpperCAmelCase  	=    True
    component.append(lowerCAmelCase       )
    for v in reversed_graph[u]:
        dfsa(lowerCAmelCase       )




def 			lowercase__  (    )       ->					List[str]:






    """simple docstring"""




    global graph, reversed_graph, scc, component, visit, stack
    for i in range(lowerCAmelCase       ):
        dfs(lowerCAmelCase       )
    UpperCAmelCase  	=    [False] * n
    for i in stack[::-1]:
        if visit[i]:
            continue
        UpperCAmelCase  	=    []
        dfsa(lowerCAmelCase       )
        scc.append(lowerCAmelCase       )
    return scc


if __name__ == "__main__":
   # n - no of nodes, m - no of edges
   SCREAMING_SNAKE_CASE_    ,  SCREAMING_SNAKE_CASE_			    =  list(map(int, input().strip().split()))

   SCREAMING_SNAKE_CASE_			    =  [[] for _ in range(n)]  # graph
   SCREAMING_SNAKE_CASE_			    =  [[] for i in range(n)]  # reversed graph
   # input graph data (edges)
   for _ in range(m):
      SCREAMING_SNAKE_CASE_    ,  SCREAMING_SNAKE_CASE_			    =  list(map(int, input().strip().split()))
      graph[u].append(v)
      reversed_graph[v].append(u)

   SCREAMING_SNAKE_CASE_			    =  []
   SCREAMING_SNAKE_CASE_			    =  [False] * n
   SCREAMING_SNAKE_CASE_			    =  []
   SCREAMING_SNAKE_CASE_			    =  []
   print(kosaraju())



