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  1. 	#include <iostream>
  2.  
  3. 	int main() {
  4. 		for(int r=0; r<5; ++r){
  5. 			for(int c=0; c<5; ++c){
  6. 	 			int R = c<=r ? c : 4-c,
  7. 	 				C = c<=r ? 4-r : r,
  8. 	 				RC = R+C,
  9. 		 			v = (RC*(RC+1)/2 +1) + ((RC%2==1) ? R : C);
  10. 	 			if(c>r){
  11. 	 				v = 26-v;
  12. 	 			}
  13. 		 		std::cout.width(3);
  14. 				std::cout << v << ',';
  15. 			}
  16. 			std::cout << '\n';
  17. 		}
  18. 	}
  19.  
Success #stdin #stdout 0.01s 5304KB
comments (?)
stdin 
Standard input is empty
stdout 
 15, 16, 22, 23, 25,
  7, 14, 17, 21, 24,
  6,  8, 13, 18, 20,
  2,  5,  9, 12, 19,
  1,  3,  4, 10, 11,
https://ideone.com/Ytk4h4
Triangular Numbers
language:
C++ (gcc 8.3)
created:
359 days ago
visibility:
public

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