- #include <cstdio> 
- #include <cmath> 
-   
- int main()  
- { 
- 	double k, p, s, years;				 
- 	scanf("%lf %lf %lf", &k, &p, &s); 
- 	if( s<=k ) 
- 	{ 
- 		years=0; 
- 		printf("%ld", years); 
- 	} 
- 	else 
- 	{ 
- 		years = log( s/k )/log( 1 + (p/100) ); 
- 		//применяя функцию округления до ближайшего большего целого, рассчитать количество лет 
- 		printf("%2.0lf", ceil(years) ); 
- 	} 
- 	return 0; 
- } 
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