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i am getting W...waiting 4 some suggation....

can anyone help me...this code keep saying wrong answer..
#include<stdio.h>
long long int fact(long long int x);
long long por(long long int z);
int main(){
long long int n,z,y;
while(scanf("%llu",&n)==1){
z=fact(n);
y=por(z);
}

return 0;}
long long int fact(long long int x){
int i,s=1;
for(i=2;i ...

i am new at progarmming..... i am having problem with this problem.. it keep saying runtime error.. here is the source code:
#include<stdio.h>
int main(){
int n,i,j,l,s,m=0,*a,*b;
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%d %d",&a ,&b );}
for(i=0;i<n;i++){
s=0;
for(j=a ;j<=b ;j++){
if(j%2==1)
s+=j ...