コード N=int(input()) a=list(map(int,input().split())) mod=200 b=[i%200 for i in a] from collections import defaultdict di=defaultdict(int) for i in b: di[i]+=1 result=0 for i in range(200): n=di[i] result+=n*(n-1)//2 print(result) 考え方 …

コード from collections import defaultdict N=int(input()) s=[] for i in range(N): tmp=list(input()) s.append(tmp) data=[] for i in s: tmp=defaultdict(int) for j in i: tmp[j]+=1 data.append(tmp) setset=[set() for i in range(len(data))] for …

コード from collections import defaultdict N=int(input()) a=[] for i in range(N): tmp=int(input()) a.append(tmp) di=defaultdict(int) for i in a: di[i]=1-di[i] count=0 for k,v in di.items(): if v==1: count+=1 print(count) 考え方 defaultdict…

from collections import defaultdict N=int(input()) a=list(map(int,input().split())) di=defaultdict(int) for i in a: di[i]+=1 lost=0 for key,kosu in di.items(): #print(key,kosu) if kosu