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  1. #include <stdio.h>
  2.  
  3.    int stair(int n){
  4.  
  5.    if(n<=2) return n;
  6.    if(n==3) return 4;
  7.    int totalways= stair(n-1)+stair(n-2)+stair(n-3);
  8.    return totalways;
  9.  
  10.  }
  11.  
  12. int main() {
  13. 	int n;
  14.     printf("Enter the value of n: \n");
  15.     scanf("%d",&n);
  16.     int ways= stair(n);
  17.     printf("%d",ways);
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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4
stdout
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Enter the value of n: 
7
https://ideone.com/uMjCUn
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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