I have solved this challenge and it is running perfectly on online compiling website i.e. ideone But while submitting solution to codechef , it is giving runtime error sigsegv.

problem: http://www.codechef.com/problems/DELIVERY

My solution:

include <iostream>

using namespace std;

int main() { int t,n,m,cnt,cnt1,flag,time=0; short int res; unsigned long int st; unsigned long int b;

cin>>t; cnt=t; res=new short int*[t];

while(t) { cnt1=0; time=0;

cin>>n;
cin>>m;
cin>>b;

res[cnt-t]=new short int[m+1];

//allocation
st=new unsigned long int*[m];
for(int i=0;i<m;i++)
{
  st[i]=new unsigned long int[4];
}

for(int i=0;i<m;i++)
{
  cin>>st[i][0];
  cin>>st[i][1];
  cin>>st[i][2];
  st[i][3]=0;
}

unsigned long int min;
int dest=0,minj=-1;


for(int i=0;i<m && time<b;i++)
{
  min=1000000001;
  for(int j=0;j<m;j++)
  {
     if(st[j][0]==dest && min>st[j][2] && !st[j][3])
     {
       min=st[j][2];
       minj=j;
     }
  }
  st[minj][3]=1;
  flag=1;
  for(int k=0;k<cnt1;k++)
  {
    if(res[cnt-t][k]==st[minj][1])
    {
      flag=0;
    }
  }

  if(flag)
  {
    res[cnt-t][cnt1++]=st[minj][1];
  }

  dest=st[minj][1];
  time+=min;
}

res[cnt-t][cnt1]=-1;

//deallocation
for(int i=0;i<m;i++)
{
  delete [] st[i];
}
delete [] st;

t--;

}

int j; for(int i=0;i<cnt;i++) { j=0; while(res[i][j]!=-1) { cout<<res[i][j++]<<" "; } cout<<"-1"; cout<<"\n"; }

for(int i=0;i<cnt;i++) { delete [] res[i]; } delete [] res;

return 0; }

Plzz help me!!!