OJ Board

Using greedy algorithm , I konw it ,but how to design it ?
Anyone can help ?

The original site:
http://acm.pku.edu.cn/JudgeOnline/showproblem?problem_id=2054

Time Limit:1000MS Memory Limit:30000K

Bob is very interested in the data structure of a tree. A tree is a directed graph in which a ...

How to find the the smallest prime factor of N? Who can help me?


Prime Test

Time Limit:10000MS Memory Limit:10000K

Description

Given a big integer number, you are required to find out whether it's a prime number.
Input

The first line contains the number of test cases T (1 <= T <= 20 ), then ...

I've still got WA,can anyone help me?


#include <iostream.h>

int f(char a)
{
if(a>='0' && a<='9')
return a-'0';
if(a>='a' && a<='z')
return a-'a'+36;
if(a>='A' && a<='Z')
return a-'A'+10;
}

int main()
{
char line[250];
int max,tmp,i,j;
unsigned long r;

line[0]='\0';
while(cin.getline ...

Hi,oulongbin ,did you consider about the call which last 24 hours?
[/quote]no call may last more than 24 hours.
I've changed my code,but still WA

//FileName : 145.cpp

//Author : Wang Bo



#include <stdio.h>

#include <iostream.h>

#include <string.h>



double rate[5][4]={0.02,0.10,0.06,0.02 ...

I've got AC(P.E.),I cannot find why ? Anyone can help me?

//FileName : 124.cpp
//Author : Wang Bo

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

char vars[20],vartot;
char graph[20][20];
char res[21];
short indeg[20],jection[26];
short j;

void Produce(short k ...

Hi,my algorithm is the same as you ,and also got WA,let's help each other!
Here is my code:

//FileName : 145.cpp

//Author : Wang Bo



#include <stdio.h>

#include <iostream.h>

#include <string.h>



double rate[5][4]={0.02,0.10,0.06,0.02,

0.05,0.25,0.15,0.05,

0.13,0.53,0.33,0.13,

0.17,0.87 ...

Hi, everybody,I'm in trouble with dealing with Big Integer, the data in some problems in UVA is very very big. Though i can use other's Big Integer library,but what can i do in a real contest? I cannot bring the e-copy with me,anyone can suggest about it

Thanks to mf, i've got it

oh , sorry, i did not express it clearly. i mean that i comiple the same code using G++ with no
error under Win XP

#include <iostream.h>

int main()
{
cout<<sizeof(__int64)<<endl;
}

comiple using G++:
error: `__int64' undeclared (first use this function)

But I can use the same code in Vim for Windows XP with no error.
Why? Who can help me?