//	+	-	*	/	--	-/
//	0	1	2	3	4	5

#include<stdio.h>
#include<math.h>

int treat(float a,float b,float c,float d);
float myF(int flag,float m,float n);
void myPrint(int type,int i,int j,int k,float a,float b,float c,float d);

int time,temp=0;
void main()
{
	int i,j,k,t,again,res,flag;
	float num[4];
	again=1;
	while(again==1)
	{
		printf ("\nPlease Enter 4 nums(1~13):\n");
		i=0;
		flag=0;
		while (flag==0)
		{
			i++;
		//	printf ("Input num-%d\n",i);
			for(i=0;i<4;i++)
			{
				scanf("%f",&num[i]);
				if (num[i]<1 || num[i]>13 || num[i]!=int(num[i]))
					flag++;
			}
			if(flag!=0)
			{
				printf ("Error input again\n",i);
				flag=0;
			}
			else
				flag=1;
		}
		for (i=0;i<4;i++)
			for (j=0;j<4;j++)
				if (j!=i)
					for (k=0;k<4;k++)
						if (k!=j && k!=i)
							for (t=0;t<4;t++)
								if (t!=i && t!=j && t!=k)
								{
									res=treat(num[i],num[j],num[k],num[t]);
								}
	if (res==0)
		printf ("\nNo answer\n");
	else ;
	//	printf ("time=%d\n\n",time);
	printf ("\n1: Go on\n2: Quit\n");
	scanf ("%d",&again);
	}
}

int treat(float a,float b,float c,float d)
{
	int i,j,k;
	float sum1,sum2,sum3;
	for (i=0;i<4;i++)
		for (j=0;j<6;j++)
			for (k=0;k<6;k++)
			{
				if ((!(i==3 && b==0)) && (!(j==3 && c==0)) && (!(k==3 && d==0)))
				{
					sum1=myF(i,a,b);
					sum2=myF(j,sum1,c);
					sum3=myF(k,sum2,d);
					if (fabs(sum3-24)<0.1)
					{
						temp++;
						myPrint(1,i,j,k,a,b,c,d);
					//	printf ("sum1:myF(%d,%2.0f,%2.0f)  sum1=%f\n",i,a,b,sum1);
					//	printf ("sum2:myF(%d,%2.0f,%2.0f)  sum2=%f\n",j,c,d,sum2);
					//	printf ("1:myF(%d,myF(%d,myF(%d,%2.0f,%2.0f),%2.0f),%2.0f)   sum3=%f\n\n",k,j,i,a,b,c,d,sum3);
					}
				}
				if (k==2)
				{
					sum1=myF(i,a,b);
					sum2=myF(j,c,d);
					sum3=sum1*sum2;
				 	if (fabs(sum3-24)<0.1)
					{
						temp++;
						myPrint(2,i,j,k,a,b,c,d);
					//	printf ("sum1:myF(%d,%2.0f,%2.0f)  sum1=%f\n",i,a,b,sum1);
					//	printf ("sum2:myF(%d,%2.0f,%2.0f)  sum2=%f\n",j,c,d,sum2);
					//	printf ("2:myF(%d,myF(%d,%2.0f,%2.0f),myF(%d,%2.0f,%2.0f))   sum3=%f\n\n",k,i,a,b,j,c,d,sum3);
					}
				}

				if (k==3)
				{
					sum1=myF(i,a,b);
					sum2=myF(j,c,d);
					if (sum2!=0)
					{
						sum3=sum1/sum2;
				 		if (fabs(sum3-24)<0.1)
						{
							temp++;
							myPrint(3,i,j,k,a,b,c,d);
						//	printf ("sum1:myF(%d,%2.0f,%2.0f)  sum1=%f\n",i,a,b,sum1);
						//	printf ("sum2:myF(%d,%2.0f,%2.0f)  sum2=%f\n",j,c,d,sum2);
						//	printf ("3:myF(%d,myF(%d,%2.0f,%2.0f),myF(%d,%2.0f,%2.0f))   sum3=%f\n\n",k,i,a,b,j,c,d,sum3);
						}
					}
				}
			}
	if (temp==0)
		return 0;
	else
		return 1;
}

float myF(int flag,float m,float n)
{	
//	time++;
	if (flag==0)
		return (m+n);
	if (flag==1)
		return (m-n);
	if (flag==2)
		return (m*n);
	if (flag==3)
		if (n==0)
			return 30000;
		else
			return (m/n);
	if (flag==4)
		return (n-m);
	if (flag==5)
		if (m==0)
			return 30000;
		else
			return (n/m);
	return 0;
}

void myPrint(int type,int i,int j,int k,float a,float b,float c,float d)
{
	char sigle[6];
		sigle[0]='+';
		sigle[1]='-';
		sigle[2]='*';
		sigle[3]='/';
		sigle[4]='-';
		sigle[5]='/';
	if (type==1){
		if(j==4 || j==5)
		{
			if (k==4 || k==5)
				printf("%2.0f %c (%2.0f %c (%2.0f %c %2.0f)) =24\n",d,sigle[k],c,sigle[j],a,sigle[i],b);
			else
				printf("(%2.0f %c (%2.0f %c %2.0f)) %c %2.0f =24\n",c,sigle[j],a,sigle[i],b,sigle[k],d);
		}
		else if (k==4 || k==5)
		{
			printf("%2.0f %c ((%2.0f %c %2.0f) %c %2.0f) =24\n",d,sigle[k],a,sigle[i],b,sigle[j],c);
		}
		else
			printf("((%2.0f %c %2.0f) %c %2.0f) %c %2.0f =24\n",a,sigle[i],b,sigle[j],c,sigle[k],d);
	}
	if (type==2 || type==3)
	{
	//	if (k==4 || k==5)
	//		printf("(%2.0f %c %2.0f) %c (%2.0f %c %2.0f)=24\n",c,sigle[j],d,sigle[k],a,sigle[i],b);
	//	else
			printf("(%2.0f %c %2.0f) %c (%2.0f %c %2.0f) =24\n",a,sigle[i],b,sigle[k],c,sigle[j],d);
	}
}