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  1. uses math;
  2.  
  3. var
  4.     dp:array[0..101,0..101] of int64;
  5.     a:array[0..101] of longint;
  6.     sum:int64;
  7.     n,m,i,j,k:longint;
  8.     s:ansistring;
  9.  
  10.  begin
  11.  
  12.   assign(input,'input.txt'); reset(input);
  13.   assign(output,'output.txt'); rewrite(output);
  14.  
  15.   readln(n,m);
  16.    for i:=1 to n do
  17.     begin
  18.      readln(s);
  19.       for j:=1 to length(s) do
  20.        if s[j] in['-','+',':','*'] then inc(a[i]);
  21.     end;
  22.  
  23.      dp[0][0]:=1;
  24.  
  25.      for i:=1 to n do
  26.       begin
  27.        for j:=0 to i-1 do
  28.         if(a[j]<a[i]) then
  29.          for k:=1 to min(i,m) do
  30.            dp[i][k]:=dp[i][k]+dp[j][k-1];
  31.        end;
  32.  
  33.         sum:=0;
  34.          for i:=1 to n do
  35.           sum:=sum+dp[i][m];
  36.  
  37.            if sum = 0 then writeln(-1) else
  38.  
  39.           writeln(sum);
  40.  
  41.  end.
Runtime error #stdin #stdout 0s 516KB
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stdin
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Standard input is empty
stdout
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An unhandled exception occurred at $08048115 :
EInOutError : File not found
  $08048115
https://ideone.com/8W8MW4
language:
Pascal (fpc 3.0.4)
created:
9 years ago
visibility:
public

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