#include<bits/stdc++.h>
using namespace std;
constexpr int LEN = 10004;
int a[LEN], b[LEN], c[LEN], d[LEN];
void Hello(){
	cout<<"计算器程序\n可支持10的10000次方位内的运算\n";
	cout<<"有如下功能\n";
	cout<<"1.常规运算\n";
	cout<<"2.面积/体积计算\n";
	cout<<"3.表达式计算\n";
	cout<<"4.三角函数\n";
	cout<<"5.算24点\n";
	cout<<"请输入一个整数a，表示所需操作,输入0则结束\n";
}
struct Gjd{
	void clear(int a[]){
		for(int i=0;i<LEN;i++){
			a[i]=0;
		}
	}
	void read(string s,int a[]){
		cin>>s;
		int len=s.size();
		for(int i=0;i<len;i++){
			a[len-i-1]=s[i]-'0';
		}
	}
	void print(int a[]){
		int i;
		for(i=LEN-1;i>=1;i--){
			if(a[i]!=0) break;
		}
		for(;i>=0;i--){
			cout<<a[i];
		}
		cout<<'\n';
	}
	void add(int a[],int b[],int c[]){
		clear(c);
		for(int i=0;i<LEN;i++){
			c[i]+=a[i]+b[i];
			if(c[i]>=10){
				c[i+1]+=c[i]/10;
				c[i]%=10;
			}
		}
	}
	void sub(int a[],int b[],int c[]){
		clear(c);
		for(int i=0;i<LEN-1;i++){
			c[i]+=a[i]-b[i];
			if(c[i]<0){
				c[i+1]-=1;
				c[i]+=10;
			}
		}
	}
	void mul(int a[],int b[],int c[]){
		clear(c);
		for(int i=0;i<LEN;i++){
			for(int j=0;j<=i;j++){
				c[i]+=a[j]*b[i-j];
			}
			if(c[i]>=10){
				c[i+1]+=c[i]/10;
				c[i]%=10;
			}
		}
	}
	bool greater_eq(int a[], int b[], int last_dg, int len) {
		if (a[last_dg + len] != 0) return true;
		for (int i = len - 1; i >= 0; --i) {
			if (a[last_dg + i] > b[i]) return true;
			if (a[last_dg + i] < b[i]) return false;
		}
		return true;
	}
	void div(int a[], int b[], int c[], int d[]) {
		clear(c);
		clear(d);
		int la, lb;
		for (la = LEN - 1; la > 0; --la)
			if (a[la - 1] != 0) break;
		for (lb = LEN - 1; lb > 0; --lb)
			if (b[lb - 1] != 0) break;
		if (lb == 0) {
			puts("不合法");
			return;
		}
		for (int i = 0; i < la; ++i) d[i] = a[i];
		for (int i = la - lb; i >= 0; --i) {
			while (greater_eq(d, b, i, lb)) {
				for (int j = 0; j < lb; ++j) {
					d[i + j] -= b[j];
					if (d[i + j] < 0) {
						d[i + j + 1] -= 1;
						d[i + j] += 10;
					}
				}
				c[i] += 1;
			}
		}
	}
};
long long binpow(long long a, long long b, long long m){
	a%=m;
	long long res=1;
	while(b>0) {
		if(b&1) res=res*a%m;
		a=a*a%m;
		b>>=1;
	}
	return res;
}
void cgys(){
	cout<<"有什么可以帮到你的\n";
	cout<<"A.加减乘除\n";
	cout<<"B.开方\n";
	cout<<"C.一个数的幂次\n";
	char op;
	cin>>op;
	if(op=='A'){
		cout<<"输入：一个形如 a <op> b 的表达式。\na、b 分别是长度不超过 1000 的十进制非负整数；\n<op> 是一个字符（+、-、* 或 /），表示运算。\n整数与运算符之间由一个空格分隔。\n";
		Gjd gjd;
		string s1,s2;
		char s;
		gjd.read(s1,a);
		cin>>s;
		gjd.read(s2,b);
		if(s=='+'){
			gjd.add(a,b,c);
			gjd.print(c);
		}
		else if(s=='-'){
			gjd.sub(a,b,c);
			gjd.print(c);
		}
		else if(s=='*'){
			gjd.mul(a,b,c);
			gjd.print(c);
		}
		else if(s=='/'){
			gjd.div(a,b,c,d);
			cout<<"商：\n";
			gjd.print(c);
			cout<<"余数：\n";
			gjd.print(d);
		}
		else cout<<"不合法";
	}
	else if(op=='B'){
		cout<<"仅可支持10的18次方内的运算\n";
		cout<<"开几次方\n";
		int opo;
		cin>>opo;
		cout<<"输入操作数\n";
		unsigned long long s;
		cin>>s;
		cout<<"结果为"<<pow(s,1.0/opo)<<'\n';
	}
	else{
		cout<<"仅可支持10的18次方内的运算\n";
		cout<<"输入底数\n";
		long long as;
		cin>>as;
		cout<<"输入幂数\n";
		long long k;
		cin>>k;
		cout<<"输入模数\n";
		long long mod;
		cin>>mod;
		cout<<binpow(as,k,mod)<<'\n';
	}
}
const double pi=3.14;
void mtjjs(){
	cout<<"可计算以下图形/物体的面积/体积\n";
	cout<<"1.正方形\n2.长方形\n3.平行四边形\n4.三角形\n5.梯形\n6.扇形\n7.扇环\n";
	int n;
	cin>>n;
	if(n==1){
		cout<<"输入边长：";
		int ap;
		cin>>ap;
		cout<<"S="<<ap*ap;
	}else if(n==2){
		cout<<"输入长：";
		int aa;
		cin>>aa;
		cout<<"输入宽：";
		int ap;
		cin>>ap;
		cout<<"S="<<aa*ap;
	}else if(n==3||n==4){
		cout<<"输入底：";
		int aa;
		cin>>aa;
		cout<<"输入高：";
		int ap;
		cin>>ap;
		if(n==4){
			cout<<"S="<<aa*ap*1.0/2<<'\n';
		}else{
			cout<<"S="<<aa*ap<<'\n';
		}
	}else if(n==5){
		cout<<"输入上底：";
		int aa;
		cin>>aa;
		cout<<"输入上底：";
		int ab;
		cin>>ab;
		cout<<"输入高：";
		int ap;
		cin>>ap;
		cout<<"S="<<(aa+ab)*ap*0.5;
	}else if(n==6){
		cout<<"输入半径：";
		int r;
		cin>>r;
		cout<<"输入圆心角：";
		int al;
		cin>>al;
		long long s=r*r*314*al;
		long long d=__gcd(s,36000ll);
		cout<<"S="<<s/d<<'/'<<36000/d;
	}else if(n==7){
		cout<<"输入外半径：";
		int r;
		cin>>r;
		cout<<"输入内半径：";
		int r1;
		cin>>r1;
		cout<<"输入圆心角：";
		int al;
		cin>>al;
		printf("%.2lf",(r*r-r1*r1)*pi*al/360.0);
	}
}
struct bdsjs{
	bool IsOperator(char c) {
		return c == '+' || c == '-' || c == '*' || c == '/'|| c == '^';
	}
// 获取运算符的优先级
	int GetPriority(char c) {
		if (c == '+' || c == '-')return 1;
		if (c == '*' || c == '/')return 2;
		if (c == '^')return 3;
		return 0;
	}
// 从字符串中读取一个数字，考虑负数的情况
	string ReadNum(string& str,int& i){
		string res;
		if(str[i] == '-'){
			res += str[i];
			i++;
		}
		while (i < str.size() && isdigit(str[i])) {
			res += str[i++];
		}
		i--;
		if(res.empty() || res == "-"){cout<<"NO"<<endl;exit(0);}
		return res;
	}
// 将中缀表达式转换为后缀表达式
	vector<string> InfixToPostfix(string& str) {
		stack<char> s;
		vector<string> tokens;
		bool symbol = false;
		for (int i = 0; i < str.size(); i++) {
			if (str[i] == '(') {
				s.push(str[i]);
			}
			else if (str[i] == ')') {
				while (s.size() && s.top()!= '(') {
					tokens.push_back(std::string(1, s.top()));
					s.pop();
				}
				s.pop();
			}else if(!symbol){
				tokens.push_back(ReadNum(str,i));
				symbol = true;
			}else if(IsOperator(str[i])){
				while (s.size() && GetPriority(str[i]) <= GetPriority(s.top())) {
					tokens.push_back(std::string(1, s.top()));
					s.pop();
				}
				s.push(str[i]);
				symbol = false;
			}
		}
		return tokens;
	}
	int PostfixToAns(std::vector<std::string>& tokens) {
		std::stack<int> s;
		for (int i = 0; i < tokens.size(); i++) {
			if (isdigit(tokens[i][0]) || tokens[i].size() > 1) {
				s.push(std::stoi(tokens[i]));
			}
			else {
				int a = s.top();s.pop();
				int b = s.top();s.pop();
				if (tokens[i] == "+") {s.push(a + b);}
				else if (tokens[i]== "-") {s.push(b - a);}
				else if (tokens[i] == "*") {s.push(a * b);}
				else if (tokens[i] == "^") {
					int sum=1;
					while(a>0){
						if(a%2!=0)sum=sum*b;
						b=b*b;
						a=a>>1;
					}
					s.push(sum);
				}
				else if (tokens[i] == "/") {if (a == 0) {std::cout<<"NO"<<std::endl;exit(0);}s.push(b / a);}
			}
		}
		return s.top();
	}
};
void bds(){
	cout<<"输入一个表达式(支持 + - * / ^)：";
	std::string expression;
	std::cin >> expression;
//  expression.pop_back();
	bdsjs js;
	expression = "(" + expression + ")";
	std::vector<std::string> tokens = js.InfixToPostfix(expression);
	int ans = js.PostfixToAns(tokens);
	cout<<"结果为："<<ans<<std::endl;
}
void sjhs(){
	cout<<"输入类型：";
	string s;
	cin>>s;
	if(s=="sin"){
		cout<<"输入弧度：";
		int p;
		cin>>p;
		cout<<sin(p);
	}else if(s=="cos"){
		cout<<"输入弧度：";
		int p;
		cin>>p;
		cout<<cos(p);
	}else{
		cout<<"输入弧度：";
		int p;
		cin>>p;
		if(cos(p)){
			cout<<sin(p)*1.0/cos(p)*1.0<<"\n";
		}
		else cout<<"不合法";
	}
}
struct Sd{
	int a[5];
	char opt[5]={' ','+','-','*','/'};
	int Js(int x,int k,int y){
		if(k==1)
			return x+y;
		if(k==2)
			return max(x,y)-min(x,y);
		if(k==3)
			return x*y;
		else
			if(!y||x<y||!x%y)
				return -9999;
			return x/y;
	}
	void Out(int a,int b,int c,int d,int e,int f,int k1,int k2,int k3){
		printf("%d%c%d=%d\n",max(a,b),opt[k1],min(a,b),Js(max(a,b),k1,min(a,b)));
		printf("%d%c%d=%d\n",max(c,d),opt[k2],min(c,d),Js(max(c,d),k2,min(c,d)));
		printf("%d%c%d=%d\n",max(e,f),opt[k3],min(e,f),Js(max(e,f),k3,min(e,f)));
	}
	void run(){
		scanf("%d%d%d%d", &a[1],&a[2],&a[3],&a[4]);
		sort(a+1,a+5);                                            //保证遍历所有情况
		do{
			for (int i = 1; i <= 4; i++){
				for (int j = 1; j <= 4; j++){
					for (int k = 1; k <= 4; k++){
						if (Js(Js(Js(a[1],i,a[2]),j,a[3]),k,a[4])==24){
							Out(a[1],a[2],Js(a[1],i,a[2]),a[3],Js(Js(a[1],i,a[2]),j,a[3]),a[4],i,j,k);
							return;
						}     //((a?b)?c)?d
						else if (Js(Js(a[1],i,a[2]),k,Js(a[3],j,a[4])) == 24){
							Out(a[1],a[2],a[3],a[4],Js(a[1],i,a[2]),Js(a[3],j,a[4]),i,j,k);
							return;
						}
					}
				}
			}                         //暴力枚举3个运算符
		}  while (next_permutation(a + 1, a + 5));
		puts("No answer!");
	}
};
void s24d(){
	cout<<"输入四个1到9之间的自然数(所有运算结果均为正整数。)：\n";
	Sd sd;
	sd.run();
}
int main(){
	Hello();
	int a;
	cin>>a;
	while(a){
		if(a==1){
			cgys();
		}
		else if(a==2){
			mtjjs();
		}
		else if(a==3){
			bds();
		}
		else if(a==4){
			sjhs();
		}
		else{
			s24d();
		}
		cout<<'\n';
		Hello();
		cin>>a;
	}
	return 0;
}