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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. inline int power(int a, int b) {
  6.     int x = 1;
  7.     while (b) {
  8.         if (b & 1) x *= a;
  9.         a *= a;
  10.         b >>= 1;
  11.     }
  12.     return x;
  13. }
  14.  
  15.  
  16. const int M = 1000000007;
  17. const int N = 3e5+9;
  18. const int INF = 2e9+1;
  19. const int LINF = 2000000000000000001;
  20.  
  21. //_ ***************************** START Below *******************************
  22.  
  23.  
  24. bool isPrime(int x){
  25. 	if(x<=1) return false;
  26. 	for(int i=2; i*i<=x; i++){
  27. 		if(x%i == 0) return false;
  28. 	}
  29. 	return true;
  30. }
  31.  
  32.  
  33. int floorPrime(int x){
  34.  
  35. 	while(!isPrime(x)){
  36. 		x--;
  37. 	}
  38.  
  39. 	return x;
  40.  
  41. }
  42.  
  43. void consistency(int x, int y) {
  44.  
  45. 	int a = floorPrime(x);
  46. 	int b = floorPrime(y);
  47.  
  48. 	cout << a-b << endl;
  49. 	cout << a << endl;
  50. }
  51.  
  52. void solve() {
  53.  
  54.     int x, y;
  55.     cin >> x >> y;
  56.  
  57.     consistency(x, y) ;
  58.  
  59. }
  60.  
  61.  
  62.  
  63.  
  64.  
  65. int32_t main() {
  66.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  67.  
  68.     int t = 1;
  69.     cin >> t;
  70.     while (t--) {
  71.         solve();
  72.     }
  73.  
  74.     return 0;
  75. }
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
copy 
2
20 10
10000000000 100000000
stdout
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12
19
9899999978
9999999967
https://ideone.com/JB3h58
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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