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  1. import java.util.Scanner;
  2.  
  3. public class Main{
  4.     public static void main(String[] args){
  5.         Scanner sc = new Scanner(System.in);
  6.         int rk = sc.nextInt();
  7.         int rn = sc.nextInt();
  8.         int rw = sc.nextInt();
  9.         int tc = 0;
  10.         for(int i=1;i<=rw;i++){
  11.             tc+=(i*rk);
  12.         }
  13.         if(tc>rn){
  14.             System.out.println(tc-rn);
  15.         }else{
  16.             System.out.println(0);
  17.         }
  18.     }
  19. }
Success #stdin #stdout 0.12s 56556KB
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stdin
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3 17 4
stdout
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13
https://ideone.com/h2zBpX
language:
Java (HotSpot 12)
created:
30 days ago
visibility:
public

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