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| ''' 5 #5个元素 c 3 2 no i 3 2 c 3 2 yes i 4 5 i 2 4 c 3 5 yes i 1 3 c 1 5 yes s # 输出the network is connected
主框架 main() while : 读入指令集 处理指令 return
''' def main(L): S = L.pop(0)[0] * [-1] for o in L: print(o,o[0]) if o[0] == 'i': Input_connection(o[1],o[2],S) if o[0] == 'c': Check_connection(o[1],o[2],S) if o[0] == 's': Check_network(S)
def find(x,s): while s[x] >= 0: x = s[x] return x def union(x,y,s=[]): s[y] = x
def Input_connection(node1,node2,S): root1 = find(node1-1,S) root2 = find(node2-1,S) if root1 != root2: union(root1,root2,S) def Check_connection(node1,node2,S): root1 = find(node1-1,S) root2 = find(node2-1,S) if root1 == root2: print('yes') else: print('no') def Check_network(S): num = 0 for i in range(len(S)): if S[i] < 0: num += 1 if num == 1: print('the network is connected') else: print('there are %d components.'%num)
if __name__ == '__main__': L = [[5] , ['c', 3, 2] , ['i', 3, 2], ['c', 3, 2] , ['i', 4, 5], ['i', 2, 4], ['c', 3, 5], ['i', 1, 3], ['c', 1, 5], ['s'] ]
main(L)
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