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  1. //  main.cpp
  2. //  CNPIIM
  3. //
  4. //  Created by Carl Jalal on 4/11/14.
  5. //  Copyright (c) 2014 Carl Jalal. All rights reserved.
  6. //
  7.  
  8. #include <stdio.h>
  9. #include <cmath>
  10.  
  11. int main()
  12. {
  13.     long answer,T,N,a,d,b,L1,amount;
  14.     long n;
  15.     float L2;
  16.  
  17.     scanf("%ld",&T);
  18.     while (T--) {
  19.         scanf("%ld",&N);
  20.  
  21.         amount = 0;
  22.         answer = 0;
  23.         n=N-N%2;
  24.         for (a = 1; a <= n/2; a++) {
  25.             d = N-a;
  26.             L1 = a*d;
  27.             //L2 = sqrt((float)L1);
  28.  
  29.  
  30.             for (b = 1; b*b < L1 ; b++) {
  31.                 //printf("%ld %f\n",b,L2);
  32.                 amount = 2*(((L1-1)/b) - b + 1) - 1;
  33.                 if (d==a) answer+=amount;
  34.                 else answer+=2*amount;
  35.  
  36.             }
  37.  
  38.         }
  39.  
  40.         printf("%ld\n",answer);
  41.     }
  42. }
Success #stdin #stdout 0.13s 3300KB
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stdout
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-1978901337
-907152770
188464060
1308198172
-1842629629
https://ideone.com/vyln1H
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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