BAEKJOON_1476_2

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) throws IOException {
        // 1 <= E <= 15
        // 1 <= S <= 28
        // 1 <= M <= 19

        //입력은 E S M

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        StringTokenizer st = new StringTokenizer(br.readLine());
        int E = Integer.parseInt(st.nextToken());
        int S = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());

        if(E==1 && S==1 && M==1){
            bw.write("1");
            bw.flush(); bw.close();
            System.exit(0);
        }

        int e1=1; int s1=1; int m1=1;
        int year=1;
        while(true){
            if(e1 > 15){
                e1 = 1;
            }
            if(s1 > 28){
                s1 = 1;
            }
            if(m1 > 19){
                m1 = 1;
            }
            if(e1==E && s1==S && m1==M){
                bw.write(String.valueOf(year));
                bw.newLine();bw.flush();
                break;
            }

            e1++; s1++; m1++;
            year++;
        }

        bw.close();

    }
}