TJU1022

本来以为数据大小会超过max_longint，写了个大数类wa。结果试着用long写一个居然ac了。
没有什么技巧，就是基本的进制转换

#include<iostream>
using namespace std;

const int MAX = 100;
int main()
{
    int data,oldn,newn;
    unsigned long n;
    char buffer[MAX],*p;
    cin>>data;
    while(data-- > 0)
    {
        cin>>buffer;
        p=buffer;
        n=oldn=newn=0;
        while(*p != '<')
        {
            cout<<*p;
            p++;
        }
        cout<<*p;
        while(*++p != '>')
        {
            oldn = oldn*10 + *p-'0';
            cout<<*p;
        }
        cout<<*p<<'=';
        p=buffer;
        while(*p != '<')
            n = oldn*n + *p++ -'0';
        while(*p++ != '>');
        while(*p != '\0')
            newn = newn*10 + *p++ -'0';
        p=buffer+MAX-1;
        *p = '\0';
        while(p!=buffer)
        {
            p--;
            *p = n%newn + '0';
            n /= newn;
        }
        while(*p=='0') p++;
        if(*p=='\0') p--;
        cout<<p;
        cout<<'<'<<newn<<'>'<<endl;
    }
    return 0;
}