[Codeforces] Round #734 (Div. 3) B2. Wonderful Coloring - 2

Codeforces Round #734 (Div. 3) B2. Wonderful Coloring - 2

  • Time : O(n)
  • Space : O(n)
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#include <bits/stdc++.h>

#pragma optimization_level 3
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx")
#pragma GCC optimize("Ofast")//Comment optimisations for interactive problems (use endl)
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")

struct PairHash {inline std::size_t operator()(const std::pair<int,int> & v) const {return v.first*31+v.second;}};

#define MAX_N 1010
#define INF 987654321
#define EPS 1e-9
#define ll long long
#define pll pair<ll, ll>
#define vpll vector<pll>
#define vall3 vector<array<ll,3>>
#define all3 array<ll,3>
#define all5 array<ll,5>
#define vall5 vector<all5>
#define vll vector<ll>
#define vs vector<string>
#define usll unordered_set<ll>
#define uspll unordered_set<pll, PairHash>
#define vvs vector<vs>
#define vvll vector<vll>
#define all(a) begin(a), end(a)

using namespace std;

vll solve(vll& A, ll k) {
ll n = A.size();
vll res(n);
unordered_map<ll, vll> freq;
for(ll i = 0; i < n; i++) freq[A[i]].push_back(i);
for(auto& [_, v] : freq) {
if(v.size() < k) continue;
for(ll i = 0; i < k; i++)
res[v[i]] = i + 1;
v.clear();
}
queue<ll> q;
for(auto& [_, v] : freq) {
while(!v.empty()) {
q.push(v.back());
v.pop_back();
}
if(q.size() >= k) {
for(ll i = 0; i < k; i++) {
res[q.front()] = i + 1;
q.pop();
}
}
}

return res;
}

int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
ll tc = 1;
cin>>tc;
for(ll i = 1; i <= tc; i++) {
ll n, k;
cin>>n>>k;
vll A(n);
for(ll j = 0; j < n; j++) cin>>A[j];
auto res = solve(A,k);
for(auto& r : res)cout<<r<<' ';cout<<endl;
}
return 0;
}
Author: Song Hayoung
Link: https://songhayoung.github.io/2022/06/11/PS/Codeforces/div3-734-b2/
Copyright Notice: All articles in this blog are licensed under CC BY-NC-SA 4.0 unless stating additionally.