C :

#include<stdio.h>
void MonthDay(int year,int day,int *pMonth,int *pDay);
int main()
{
	int year[100],yearDay[100],i,n,m,d;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	scanf("%d %d",&year[i],&yearDay[i]);
	for(i=0;i<n;i++)
	{
		MonthDay(year[i],yearDay[i],&m,&d);
		if(i!=n-1)	printf("%d-%d\n",m,d);
		else printf("%d-%d",m,d);
	}
	return 0;
}

void MonthDay(int year,int yearDay,int *pMonth,int *pDay)
{
	if(year%4==0&&year%100!=0||year%400==0)
	{
		if(yearDay>=1&&yearDay<=31)
		{
			*pMonth = 1;
			*pDay = yearDay;
		}
		else if(yearDay>31&&yearDay<=60)
		{
			*pMonth = 2;
			*pDay = yearDay-31;
		}
		else if(yearDay>60&&yearDay<=91)
		{
			*pMonth = 3;
			*pDay = yearDay-60;
		}
		else if(yearDay>91&&yearDay<=121)
		{
			*pMonth = 4;
			*pDay = yearDay-91;
		}
		else if(yearDay>121&&yearDay<=152)
		{
			*pMonth = 5;
			*pDay = yearDay-121;
		}
		else if(yearDay>152&&yearDay<=182)
		{
			*pMonth = 6;
			*pDay = yearDay-152;
		}
		else if(yearDay>182&&yearDay<=213)
		{
			*pMonth = 7;
			*pDay = yearDay-182;
		}
		else if(yearDay>213&&yearDay<=244)
		{
			*pMonth = 8;
			*pDay = yearDay-213;
		}
		else if(yearDay>244&&yearDay<=274)
		{
			*pMonth = 9;
			*pDay = yearDay-244;
		}
		else if(yearDay>274&&yearDay<=305)
		{
			*pMonth = 10;
			*pDay = yearDay-274;
		}
		else if(yearDay>305&&yearDay<=335)
		{
			*pMonth = 11;
			*pDay = yearDay-305;
		}
		else if(yearDay>335)
		{
			*pMonth = 12;
			*pDay = yearDay-335;
		}
	}
	else
	{
		if(yearDay>=1&&yearDay<=31)
		{
			*pMonth = 1;
			*pDay = yearDay;
		}
		else if(yearDay>31&&yearDay<=59)
		{
			*pMonth = 2;
			*pDay = yearDay-31;
		}
		else if(yearDay>59&&yearDay<=90)
		{
			*pMonth = 3;
			*pDay = yearDay-59;
		}
		else if(yearDay>90&&yearDay<=120)
		{
			*pMonth = 4;
			*pDay = yearDay-90;
		}
		else if(yearDay>120&&yearDay<=151)
		{
			*pMonth = 5;
			*pDay = yearDay-120;
		}
		else if(yearDay>151&&yearDay<=181)
		{
			*pMonth = 6;
			*pDay = yearDay-151;
		}
		else if(yearDay>181&&yearDay<=212)
		{
			*pMonth = 7;
			*pDay = yearDay-181;
		}
		else if(yearDay>212&&yearDay<=243)
		{
			*pMonth = 8;
			*pDay = yearDay-212;
		}
		else if(yearDay>243&&yearDay<=173)
		{
			*pMonth = 9;
			*pDay = yearDay-243;
		}
		else if(yearDay>273&&yearDay<=304)
		{
			*pMonth = 10;
			*pDay = yearDay-373;
		}
		else if(yearDay>304&&yearDay<=334)
		{
			*pMonth = 11;
			*pDay = yearDay-304;
		}
		else if(yearDay>334)
		{
			*pMonth = 12;
			*pDay = yearDay-334;
		}
	}
}