function solution(N) {
          var enable_print = N % 10;
          while (N > 0) {
            if (enable_print == 0 && N % 10 != 0) {
              enable_print = 1;
            }
            else if (enable_print == 1) {
              process.stdout.write((N % 10).toString());
            }
            N = Math.floor(N / 10);
          }
        }