解题思路:
注意事项:
参考代码:
s =0 while True: try: m = input() if '?' not in m: if '+' in m: a = m[:m.index('+')] b = m[m.index('+')+1:m.index('=')] c = m[m.index('=')+1:] if int(a) + int(b) == int(c): s += 1 if '-' in m: a = m[:m.index('-')] b = m[m.index('-')+1:m.index('=')] c = m[m.index('=')+1:] if int(a) - int(b) == int(c): s += 1 except: break print(s)
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