Submission #689959

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
689959	2023-01-29 21:53:07	NK_	Martian DNA (BOI18_dna)	C++17	100 / 100	115 ms	19956 KiB

dna

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// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>
using namespace std;
#define nl '\n'
int main() {
  cin.tie(0)->sync_with_stdio(0);
  
  int N, K, R; cin >> N >> K >> R;
  vector<int> A(N); for(auto& x : A) cin >> x;
  vector<vector<int>> oc(K); for(int i = 0; i < N; i++) oc[A[i]].push_back(i);
  
  vector<int> Q(K, -1); 
  for(int i = 0; i < R; i++) {
    int x, y; cin >> x >> y; Q[x] = --y;
  }
  set<int> S; 
  for(int i = 0; i < K; i++) {
    if (Q[i] == -1) continue;
    if (Q[i] >= int(size(oc[i]))) {
      cout << "impossible" << nl;
      return 0;
    }
    S.insert(oc[i][Q[i]]);
  }
 
 
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• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 32 / 32