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 special no...

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 the foll...

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....

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, 0.05,0.25,0.1...

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) { shor...

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, 0.17,0.87,0.47,0.17, 0.30...

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?