algo2017_week5_Differential

#include <bits/stdc++.h>
using namespace std;
#define fo(n) for(int i=0;i<=n;i++)

int main(){

    string s;
    while( getline( cin , s ) ){

        stringstream ss;
        ss << s;

        int t = 0 , n;

        fo( s.size() ) if( s[i] == ' ' ) ++t;

        if( !t ) putchar('0');
        for( int i = t ; i > 0 ; --i ){
            ss >> n;
            if( !n ) continue;
            if( n > 0 && i < t ) putchar('+');
            if( i == 1 ) printf( "%d" , n );
            else if( i == 2 ) printf( "%dX" , n * i );
            else printf( "%dX^%d" , n * i , i - 1 );
        }
        puts("");
    }

    return 0;
}