Python3 代码

s = eval(input())

sr = [0, 400.01, 800.01, 1200.01, 2000.01]
p = [0.15, 0.12, 0.10, 0.07, 0.04]

for i in range (len(sr)):

    if i == len(sr) - 1:
        incP = p[i]
        break

    if (s >= sr[i] and s < sr[i+1]):
        incP = p[i]
        break

inc = s * incP
s += inc  

print("Novo salario:", f'{s:.2f}')
print("Reajuste ganho:", f'{inc:.2f}')
print("Em percentual: " + f'{incP * 100:.0f}' + " %")