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Sokushi Cheat ga Saikyou sugite, Isekai no Yatsura ga Marude Aite ni Naranai n desu ga.
Feb 9, 4:26 AM
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-/12
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10
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public class Permutation{
public static void main (String [] args){
String input1, input2;
long num, pick;
input1=JOptionPane.showInputDialog("Enter N:");
input2=JOptionPane.showInputDialog("Enter R:");
num=Long.parseLong(input1);
pick=Long.parseLong(input2);
long x=1;
long y=1;
long total=0;
long num1=1;
if (num>= 0){
y=num-pick;
while(num>1){
x=x*num;
num=num-1;
}
// System.out.println(x);
if (y>=0){
while(y>1){
num1=num1*y;
total=x/num1;
y=y-1;
}
System.out.println(total);
}
else{
System.out.println("Incorrect value of r");
}
}
}
}