#include <stdio.h>
#include <stdlib.h>
#include <string.h>




int main(int argc, char *argv[]) 
{
	int lMax[12] = { 
		 31 ,          //1月
	     28 ,          //2月
	     31 ,          //3月
	     30 ,          //4月
	     31 ,          //5月
	     30 ,          //6月
	     31 ,          //7月
	     31 ,          //8月
	     30 ,          //9月
	     31 ,          //10月
	     30 ,          //11月
	     31           //12月
	};

	int lCount = 0;
    
	for( int lMonth = 0; lMonth < 12; lMonth++ )
	{
		int lTenth = 0;
		int lFirst = 0;
		for( int lDay = 1; lDay <= lMax[lMonth]; lDay++ )
		{

			if( lDay % 10 == 0 )
				lTenth++;

			lFirst = lDay - lTenth*10;

			if( lMonth+1 == lTenth + lFirst )
			{
				//printf( "%d月%d%d日\n", lMonth+1,lTenth, lFirst );
				lCount++;
			}

		}




	}

	printf( "%d\n", lCount );



	return 0;

}