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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <stdlib.h>
  4.  
  5. unsigned long long int pow4(unsigned long long int n)
  6. {
  7.     return (n * n * n * n);
  8. }
  9.  
  10. int main()
  11. {
  12.     int a,b,c,d,i;
  13.     int ctr = 0;
  14.     unsigned long long int beki,temp;
  15.     unsigned long long int sigma[] = {
  16.                                         98,      //0^4 + 1^4 + 2^4 + 3^4 = 98
  17.                                         354,     //1^4 + 2^4 + 3^4 + 4^4 = 354
  18.                                         978,     //2^4 + 3^4 + 4^4 + 5^4 = 978
  19.                                         2258,    //3^4 + 4^4 + 5^4 + 6^4 = 2258
  20.                                         4578,    //4^4 + 5^4 + 6^4 + 7^4 = 4578
  21.                                         8418,    //5^4 + 6^4 + 7^4 + 8^4 = 8418
  22.                                         14354,   //6^4 + 7^4 + 8^4 + 9^4 = 14354
  23.                                         23058,   //7^4 + 8^4 + 9^4 + 10^4 = 23058
  24.                                         35298,   //8^4 + 9^4 + 10^4 + 11^4 = 35298
  25.                                         51938,   //9^4 + 10^4 + 11^4 + 12^4 = 51938
  26.                                         };
  27.     int no_of_sigma = sizeof(sigma)/sizeof(unsigned long long int);
  28.     FILE *file;
  29.  
  30.     file = fopen("bekijyo_4.txt", "w");
  31.  
  32.     for (a = 1; a < 500; a++) {
  33.         for (b = a + 1; b < 500; b++) {
  34.             for (c = b + 1; c < 500; c++) {
  35.                 for (d = c + 1; d < 500; d++) {
  36.                     beki =pow4(a) + pow4(b) + pow4(c) + pow4(d);
  37.                     for (i = 0; i < no_of_sigma; i++){
  38.                         temp = pow4(sigma[i]);
  39.                         if (beki < temp) break;
  40.                         if (beki == temp){
  41.                             if (ctr == 0){
  42.                                 printf("ready-----go!\n");
  43.                             }
  44.                             ctr++;
  45.                             printf
  46.                                 ("(%d ,%d ,%d,%d)=(%d ,%d ,%d, %d)=(%llu) \n",
  47.                                  a, b, c, d,(i),(i+1),(i+2),(i+3),sigma[i]);
  48.                             fprintf(file,
  49.                                     "(%d ,%d ,%d ,%d)=(%d ,%d ,%d ,%d)=(%llu) \n",
  50.                                     a, b, c, d,(i),(i+1),(i+2),(i+3),sigma[i]);
  51.                             break;
  52.                         }
  53.                     }
  54.                 }
  55.             }
  56.         }
  57.     }
  58.     fclose(file);
  59.     printf("finish!");
  60.     return 0;
  61. }
  62.  
Time limit exceeded #stdin #stdout 5s 4608KB
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https://ideone.com/qsofO3
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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