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  1. #include <math.h>
  2. #include <stdio.h>
  3. #include <string.h>
  4. #include <stdlib.h>
  5. #include <assert.h>
  6. #include <limits.h>
  7. #include <stdbool.h>
  8.  
  9. #define N_MAX 1000001
  10.  
  11. int solns[N_MAX];
  12.  
  13. void initialize_solns() {
  14.     for (int i = 0; i < N_MAX; i++) {
  15.         solns[i] = 0;
  16.     }
  17.     solns[1] = 1;
  18.     solns[2] = 2;
  19.     solns[3] = 3;
  20.     solns[4] = 3;
  21.     // Actually solve
  22.     for (int i = 1; i < N_MAX; i++) {
  23.         if (!solns[i] || solns[i-1] + 1 < solns[i]) {
  24.             solns[i] = solns[i-1] + 1;
  25.         }
  26.         for (int j = 1; j <= i && j * i < N_MAX; j++) {
  27.             if (!solns[j*i] || solns[i] + 1 < solns[j*i]) {
  28.                 solns[j*i] = solns[i] + 1;
  29.             }
  30.         }
  31.     }
  32. }
  33.  
  34. int main() {
  35.     initialize_solns();
  36.     int Q; 
  37.     scanf("%i", &Q);
  38.     for(int a0 = 0; a0 < Q; a0++){
  39.         int N; 
  40.         scanf("%i", &N);
  41.         printf("%d\n", solns[N]);
  42.     }
  43.     return 0;
  44. }
Success #stdin #stdout 0.03s 5448KB
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https://ideone.com/zkW8XZ
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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