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shahedcsenu wrote:i cNT UNDERStand the problem...when light on and when off .;.plz anyone can explain it??

check my earlier post.

some people are running the knapsack DP G times which is eventually slowing down their program. for each case, you should run the the DP only once for that person who has the highest maximal weight. the others will be solved as a sub-problem! it only took me 0.028 secs!

regards
sauro

hello nb2,
first of all, i think you should declare a bigger variable as long isn't sufficient enough to hold an integer of size (2^32-1) . . unsigned long will be enough.
2ndly, you are simulating the whole program where the problem is all about simple math! try checking whether the number is a ...

I don't understand why I keep getting WA in this . . . please someday help me out! :(

[c]
#include <stdio.h>

union
{
long data;
char bit[4];
}x,y;

int main()
{
int i;
while(scanf("%ld",&x.data)==1)
{

for(i=0;i<4;i++)
{
y.bit[3-i]=x.bit[i];
}

printf("%ld converts to %ld\n",x.data,y ...