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  1. #include <stdint.h>
  2. #define N 1<<27
  3.  
  4. #define min(x, y) (x<y?x:y)
  5. #define max(x, y) (x<y?y:x)
  6. #define SWAP(x,y) { const uint64_t a = min(temp[x], temp[y]); const uint64_t b = max(temp[x], temp[y]); temp[x] = a; temp[y] = b;}
  7.  
  8. uint64_t s[2] = {0xb78895b278bfd25bULL, 0x5b1384c2629587a9ULL};
  9.  
  10. inline uint64_t xrand(void) {
  11.         uint64_t s1 = s[0];
  12.         const uint64_t s0 = s[1];
  13.         s[0] = s0;
  14.         s1 ^= s1 << 23;
  15.         return (s[1] = (s1 ^ s0 ^ (s1 >> 17) ^ (s0 >> 26))) + s0;
  16. }
  17.  
  18. int main(void){
  19.         uint32_t i;
  20.         uint64_t temp[9] = {0}, t, r;
  21.  
  22.         for(i = 0; i < N; i ++){
  23.                 temp[0] = xrand();
  24.                 temp[1] = xrand();
  25.                 temp[2] = xrand();
  26.                 temp[3] = xrand();
  27.                 temp[4] = xrand();
  28.                 temp[5] = xrand();
  29.                 temp[6] = xrand();
  30.                 temp[7] = xrand();
  31.                 temp[8] = xrand();
  32.  
  33.                 SWAP(0, 1);
  34.                 SWAP(3, 4);
  35.                 SWAP(6, 7);
  36.                 SWAP(1, 2);
  37.                 SWAP(4, 5);
  38.                 SWAP(7, 8);
  39.                 SWAP(0, 1);
  40.                 SWAP(3, 4);
  41.                 SWAP(6, 7);
  42.                 SWAP(0, 3);
  43.                 SWAP(3, 6);
  44.                 SWAP(0, 3);
  45.                 SWAP(1, 4);
  46.                 SWAP(4, 7);
  47.                 SWAP(1, 4);
  48.                 SWAP(2, 5);
  49.                 SWAP(5, 8);
  50.                 SWAP(2, 5);
  51.                 SWAP(1, 3);
  52.                 SWAP(5, 7);
  53.                 SWAP(2, 6);
  54.                 SWAP(4, 6);
  55.                 SWAP(2, 4);
  56.                 SWAP(2, 3);
  57.                 SWAP(5, 6);
  58.  
  59.                 r ^= temp[6];
  60.         }
  61.  
  62.         return r;
  63. }
  64.  
Time limit exceeded #stdin #stdout 5s 2008KB
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https://ideone.com/VyTm3R
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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