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  1. #include <iostream>
  2.  
  3. #define ll long long 
  4. #include <cmath>
  5. using namespace std;
  6.  
  7. int main(){
  8.  
  9.  
  10.  
  11. float n, m, a;
  12. // int res = 0;
  13. scanf("%f %f %f", &n, &m, &a);
  14.  
  15.  
  16. if ( a > n && a > m ){
  17. 	cout << 1 << '\n';
  18. }
  19. else{
  20.  
  21. 	if (  (a>=n&&!(a>=m))|| (!(a>=n)&&(a>=m))){
  22. 		cout << 2 << '\n';
  23. 	}
  24. 	else{
  25. 		float half1=n/2, half2=m/2, res = 0, area1 = n * m, area2 = a * a;
  26.  
  27.  
  28. 		//cout << "half1 is " << half1 << ", half2 is " << half2 << " and a is " << a << '\n';
  29. 		if (  (a >= half1 && !( a >= half2) )|| ( !(a >= half1) &&  a >= half2 )){
  30.  
  31. 			res = ( (  area1 / area2  - 0.5 ) == ceil( area1 / area2 )  ) ? ceil( area1 / area2 ) + 2 : ceil( area1 / area2 ); 
  32.  
  33. 			cout << res << '\n'; 
  34. 		}
  35. 		else if ( a < half1 && a < half2 ) {
  36. 			// in the case of 'a' being smaller than the halves of both lengths	
  37. 			ll area3 = area1, area4 = area2;
  38. 			if ( area3 % area4 == 0 ){
  39. 				res = area1 / area2; 
  40. 				cout << res << '\n';
  41. 			}
  42. 			else{
  43. 				res =( area1 / area2 ) + area3 % area4;
  44. 				cout << res << '\n';	
  45. 			}
  46. 		}
  47. 		else{
  48.  
  49. 			// float res2 = area1 / area2;
  50. 			cout << 4 << '\n';	
  51. 		}
  52. 		// printf("%lld\n", res);
  53. 	}
  54. }
  55.  
  56. }
  57.  
Success #stdin #stdout 0s 5320KB
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stdin
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6 6 4
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4
https://ideone.com/RonFOt
language:
C++ (gcc 8.3)
created:
6 hours ago
visibility:
public

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