火影手游回调秽土鼬

def updic(val,dic): if val in dic: dic[val] += 1 else: dic[val]=1 N,C = map(int,input().split()) x = input() a = []; j = 0; dic = {} for i in range(len(x)): if x[i] == " ": a.append(int(x[i-j:i])) updic(a[-1],dic) j=0 else: j += 1 a.append(int(x[i-j+1:i+1]))
updic(a[-1], dic)

ans = 0 for k in dic: t = k-C if t in dic: ans += dic[t]*dic[k] print(ans)