forked from abheekd/usaco-practice
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
17 lines
293 B
17 lines
293 B
#include <iostream>
|
|
using namespace std;
|
|
|
|
int main() {
|
|
int k, n, total_cost;
|
|
total_cost = 0;
|
|
long w;
|
|
cin >> k >> n >> w;
|
|
for (int i = 1; i < w + 1; i++) {
|
|
total_cost += i * k;
|
|
}
|
|
total_cost -= n;
|
|
if (total_cost < 0) {
|
|
total_cost = 0;
|
|
}
|
|
cout << total_cost << endl;
|
|
}
|
|
|