PROGRAM th4 () { int a = 7, b = 17, c = 42, d; int K; K = READ_INT(); if (K < a) WRITELN("Nothing"); else if (K < b) WRITELN(a); else if (K < c) WRITELN(b); else { do { d = 3*c + 2*b + a; a = b; b = c; c = d; } while (c <= K); WRITELN(b); } }