# your code goes here

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p = 0.7

# 方案1
s1_high = 100 * 10 - 300
s1_low = -20 * 10 - 300
emv1 = p * s1_high + (1 - p) * s1_low

# 方案2
s2_high = 40 * 10 - 140
s2_low = 30 * 10 - 140
emv2 = p * s2_high + (1 - p) * s2_low

# 方案3
s3_high = (40 * 3 + 95 * 7) - (140 + 200)
s3_low = 30 * 10 - 140
emv3 = p * s3_high + (1 - p) * s3_low

print(f"方案1期望收益：{emv1}万元")
print(f"方案2期望收益：{emv2}万元")
print(f"方案3期望收益：{emv3}万元")

# 输出结果：
# 方案1期望收益：340.0万元
# 方案2期望收益：230.0万元
# 方案3期望收益：359.5万元