public class No188 {
    public static void main(String[] args) {

    int sum_days[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 1,
      2, 3, 4, 5, 6, 7, 8, 9,10, 2,
      3, 4, 5, 6, 7, 8, 9,10,11, 3,
      4};

    int happydays = 0;

    for (int i = 0; i < 31; i++){ // 1月
      if ( sum_days[i] == 1 ) happydays++;
    }

    for (int i = 0; i < 28; i++){ // 2月
      if ( sum_days[i] == 2 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ // 3月
      if ( sum_days[i] == 3 ) happydays++;
    }

    for (int i = 0; i < 30; i++){ // 4月
      if ( sum_days[i] == 4 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ // 5月
      if ( sum_days[i] == 5 ) happydays++;
    }

    for (int i = 0; i < 30; i++){ // 6月
      if ( sum_days[i] == 6 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ // 7月
      if ( sum_days[i] == 7 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ // 8月
      if ( sum_days[i] == 8 ) happydays++;
    }

    for (int i = 0; i < 30; i++){ // 9月
      if ( sum_days[i] == 9 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ //10月
      if ( sum_days[i] == 10 ) happydays++;
    }

    for (int i = 0; i < 30; i++){ //11月
      if ( sum_days[i] == 11 ) happydays++;
    }

    for (int i = 0; i < 31; i++){ //12月
      if ( sum_days[i] == 12 ) happydays++;
    }

  System.out.println( happydays );

  }
}