Codeforces 546A Soldier and Bananas solution in C++
Codeforces 546A. Soldier and Bananas Question A. Soldier and Bananas A soldier wants to buy w bananas in the shop. He has to pay k dollars for the first banana, 2k dollars for the second one and so on (in other words, he has to pay i·k dollars for the i-th banana). He has n dollars. How many dollars does he have to borrow from his … Read more