import std.stdio, std.conv, std.math, std.string, std.range, std.array,
       std.algorithm;

void main(){
  auto N = readln().strip().to!int();

  if(N%2) write(7);
  else write(1);
  
  foreach(int i; 0 .. N / 2 - 1) {
    write(1);
  }

  writeln();

}