AtCoder Beginner Contest 151 C. Welcome to AtCoder【Python】
https://atcoder.jp/contests/abc151/tasks/abc151_c
AtCoder ProblemsのRecommendationで Difficulty: 333、Solve Probability: 52%でした。
N, M = map(int, input().split()) S = [] for i in range(N): S.append([]) for i in range(M): p, s = input().split() p = int(p) S[p-1].append(s) ac_num = 0 pena_num = 0 for i in range(N): sum_wa = 0 for j in S[i]: if j == 'WA': sum_wa += 1 else: ac_num += 1 pena_num += sum_wa break print(ac_num, pena_num)
1度入力例2に引っかかってしまったのが反省点です。