atcoder.jp 解答 h,w = map(int,input().split()) a = [[0]*w]*h flag = False for i in range(h): a[i] = list(map(int,input().split())) for i in range(h-1): for j in range(w-1): if (a[i][j]+a[i+1][j+1]) > (a[i+1][j]+a[i][j+1]): flag = False bre…

atcoder.jp 解答 n = int(input()) cnt = [0] * (n+1) for _ in range(n-1): a,b = map(int,input().split()) cnt[a] += 1 cnt[b] += 1 for i in range(1,n+1): if cnt[i] == (n-1): print('Yes') exit() print('No') ひたすら多重配列に入力値を入れて、そ…