760A - Petr and a calendar.cpp

/*
Petr wants to make a calendar for current month. For this purpose he draws a table in which columns correspond to weeks (a week is seven consequent days from Monday to Sunday), rows correspond to weekdays, and cells contain dates. For example, a calendar for January 2017 should look like on the picture:


Petr wants to know how many columns his table should have given the month and the weekday of the first date of that month? Assume that the year is non-leap.

Input
The only line contain two integers m and d (1?=?m?=?12, 1?=?d?=?7) — the number of month (January is the first month, December is the twelfth) and the weekday of the first date of this month (1 is Monday, 7 is Sunday).

Output
Print single integer: the number of columns the table should have.

Examples
inputCopy
1 7
outputCopy
6
inputCopy
1 1
outputCopy
5
inputCopy
11 6
outputCopy
5
Note
The first example corresponds to the January 2017 shown on the picture in the statements.

In the second example 1-st January is Monday, so the whole month fits into 5 columns.

In the third example 1-st November is Saturday and 5 columns is enough.
*/



#include<bits/stdc++.h>
using namespace std;
 
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    int m, d;
    cin >> m >> d;
    
    vector <int> month = {31,28,31,30,31,30,31,31,30,31,30,31};
    
    int days = month[m - 1];
	days = days - (7 - d + 1);
	
	cout << 1 + ceil(days / 7.0);
    
    return 0;
}