paizaラーニング「二次元配列での要素の検索 Python3編」 - Qiita

n, k = map(int, input().split()) a = [input().split() for _ in range(n)] for i in range(n): for j in range(k): if int(a[i][j]) == 1: print(i+1, j+1) n, k = map(int, input().split()) a = [input().split() for _ in range(n)] for i in range(n): for j in range(k): if a[i][j] == "1": print(i + 1, j + 1) break