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  1. #include<cstdio>
  2. #include<iostream>
  3. #include<set>
  4. #include<algorithm>
  5. #define ll long long int
  6.  
  7. using namespace std;
  8.  
  9. multiset<ll> s;
  10.  
  11. ll n, k, c, inf = 1e18 + 2;
  12.  
  13. void initialize(){
  14.     s.clear();
  15.     return;
  16. }
  17.  
  18. bool cmp(ll& a, ll& b){
  19.     return a < b;
  20. }
  21.  
  22. bool safe(ll a, ll b){
  23.     if(a <= inf/b) return true;
  24.     return false;
  25. }
  26.  
  27. ll check(ll x){
  28.     multiset<ll> :: iterator it;
  29.     it = s.lower_bound(x);
  30.     //cout << *it << endl;
  31.     if(it != s.end()) return *it;
  32.     return 0;
  33. }
  34.  
  35. void remove_used(ll a){
  36.     multiset<ll> :: iterator it, newit;
  37.     it = s.find(a);
  38.     s.erase(it);
  39.     ll temp = c, curr = a*temp;
  40.     for(int j=1; j<k; j++){
  41.         it = s.lower_bound(curr);
  42.         temp = *it;
  43.         s.erase(it);
  44.         temp = temp*c;
  45.         curr = temp;
  46.     }
  47.     return;
  48. }
  49.  
  50. bool IsPoss(){
  51.     if(s.empty()) return false;
  52.     bool flag = 0;
  53.     ll temp = c, start = *(s.begin()), curr = start*temp;
  54.     if(!safe(start, temp)) return false;
  55.     //printf("%lld ",start);
  56.     for(int j=1; j<k; j++){
  57.         ll result = check(curr);
  58.         if(!result) return false;
  59.         temp = result;
  60.         if(!safe(temp, c)) return false;
  61.         temp *= c;
  62.         curr = temp;
  63.     }
  64.     remove_used(start);
  65.     return true;
  66. }
  67.  
  68. void solve(){
  69.     int ans = 0;
  70.     while(IsPoss()){
  71.         ans++;
  72.     }
  73.     printf("%d\n",ans);
  74.     return;
  75. }
  76.  
  77. int main(){
  78.     int t;
  79.     scanf("%d",&t);
  80.     while(t--){
  81.         initialize();
  82.         scanf("%lld %lld %lld",&n ,&k ,&c);
  83.  
  84.         for(int j=0; j<n; j++){
  85.             ll temp;
  86.             scanf("%lld",&temp);
  87.             s.insert(temp);
  88.         }
  89.         solve();
  90.     }
  91.     return 0;
  92. }
  93.  
Success #stdin #stdout 0s 15240KB
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https://ideone.com/NXIGZY
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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