alt Hacker NewsXor swap trick has perfect profile for underhanded C contests. It generally works until a specific condition triggers its failure. The condition is "the arguments are aliases", so for example XOR_SWAP(a[i], a[j]) when i=j.
Xor swap trick has perfect profile for underhanded C contests. It generally works until a specific condition triggers its failure. The condition is "the arguments are aliases", so for example XOR_SWAP(a[i], a[j]) when i=j.