import std.stdio, std.algorithm, std.string, std.string, std.conv;
int readint() {
    return readln.chomp.to!int;
}
void main(){
    int w = readint(), d = readint();
    int ans = 0;
    while(w > 0 && d > 0) {
        ans = w / d / d;
        d--;
        w -= ans;
    }
    writeln(ans);
    auto _ = readln();
}