import std.algorithm, std.conv, std.range, std.stdio, std.string; void readV(T...)(ref T t){auto r=readln.splitter;foreach(ref v;t){v=r.front.to!(typeof(v));r.popFront;}} T[] readArray(T)(size_t n){auto a=new T[](n),r=readln.splitter;foreach(ref v;a){v=r.front.to!T;r.popFront;}return a;} T[] readArrayM(T)(size_t n){auto a=new T[](n);foreach(ref v;a)v=readln.chomp.to!T;return a;} void main() { int n; readV(n); int[] t; foreach (k; 1..n+1) { auto ti = k*(k+1)/2; if (ti > n) break; t ~= ti; } auto b = new bool[](n+1); foreach (ti; t) b[ti] = true; if (b[n]) { writeln(1); return; } foreach (i; 1..n+1) if (b[i] && b[n-i]) { writeln(2); return; } writeln(3); }