import std.stdio, std.string, std.conv, std.math;

void main(){
    uint w = readln.strip.to!uint;
    uint d = readln.strip.to!uint;

    uint remainWork = w;
    uint dayWorks = 0;

    foreach(day; 0..d){
        dayWorks = remainWork/(d-day)^^2;
        remainWork -= dayWorks;
    }

    dayWorks.writeln();
}