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  1. #include <cstdio>
  2. #include <cmath>
  3.  
  4. float credit(float a, float b, float c, float x) {
  5.     float n = ceil(-log(((a - 1) * x) / (b - c) + 1) / log(a));
  6.     return c * n + (pow(a, n) * ((a - 1) * x + b - c) - b + c) / (a - 1);
  7. }
  8.  
  9. int main() {
  10.     float a, b, c, x;
  11.     scanf("%f %f %f %f", &a, &b, &c, &x);
  12.     printf("%.2f", credit(a, b, c, x));
  13.     return 0;
  14. }
Success #stdin #stdout 0s 3344KB
comments (?)
stdin
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1.03 1000 5000 40000
stdout
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61270.18
https://ideone.com/011Zde
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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