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CodeChef submission 737718 (PAS fpc)

CodeChef submission 737718 (PAS fpc) plaintext list. Status: AC, problem COLCHAIN, contest . By giongto35 (giongto35), 2011-11-22 12:46:47.
uses math;
const maxn=100002;
cmod = 1000000007;
var f1,f2:text;
F:array[0..maxn*2] of longint;
G:array[0..maxn*2] of longint;
n,m:longint;
T:longint;
GT:array[0..maxn] of longint;
res,i:longint;
 
Procedure DP;
var i,j:longint;
begin
        Fillchar(F,sizeof(F),0);
        Fillchar(g,sizeof(G),0);
        For j:=1 to m do
        Begin
          if j<=n-m-1 then
          Begin
          G[j]:=(G[j-1]+G[j]) mod CMod;
          F[j]:=((int64((m+1)-j)*(m*int64(GT[m-1]) mod cmod) mod Cmod) mod CMod+G[j]) mod Cmod;
          G[j+1]:=(G[j+1]+F[j]) mod CMod;
          G[j+m]:=(G[j+m]-F[j]) Mod Cmod;
          ENd
          else
          Begin
            F[j]:=(int64((m+1)-j)*(m*int64(GT[m-1]) mod cmod) mod Cmod) mod CMod;
          End;
          F[j+m]:=F[j];
        End;
        For j:=m+1 to n-m-1 do
          Begin
            G[j]:=(G[j-1]+G[j]) mod Cmod;
            F[j]:=(F[j]+G[j]) mod CMod;
            if j<n-m then
            Begin
              G[j+1]:=(G[j+1]+F[j]) mod CMod;
              G[j+m]:=(G[j+m]-F[j]) mod Cmod;
            End;
            F[j+m]:=F[j];
          End;
        res:=0;
        for j:=max(1,n-m) to n-1 do
        Begin
          G[j]:=(G[j-1]+G[j]) mod CMod;
          F[j]:=(F[j]+G[j]) mod Cmod;
        End;
        For j:=max(1,n-m) to n-1 do
          res:=(res+F[j]) mod Cmod;
        While res<0 do res:=res+cmod;
        writeln(f2,res);
end;
 
Begin
        assign(f1,'');reset(f1);
        assign(F2,'');rewrite(F2);
        readln(f1,T);
        GT[0]:=1;
        for i:=1 to maxn do
        GT[i]:=(int64(Gt[i-1])*i) mod CMod;
        While T>0 do
        Begin
          readln(f1,n,m);
          DP;
          Dec(T);
        End;
        close(f1);
        close(F2);
End.

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