Submission #959361

#	Time	Username	Problem	Language	Result	Execution time	Memory
959361		Spade1	Martian DNA (BOI18_dna)	C++14	100 / 100	28 ms	3932 KiB

dna

#pragma once
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef double db;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ld> vld;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<pld> vpld;
typedef vector<vi> vvi;

template<typename T> using pq = priority_queue<T>;
template<typename T> using pqg = priority_queue<T, vector<T>, greater<T>>;

#define rep0(a) for (int i = 0; i < a; ++i)
#define rep1(i, a) for (int i = 0; i < a; ++i)
#define rep2(i, a, b) for (int i = a; i <= b; ++i)
#define rep3(i, a, b, c) for (int i = a; i <= b; i+=c) 
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, rep3, rep2, rep1, rep0)(__VA_ARGS__)
#define repd0(a) for (int i = a; i >= 1; --i)
#define repd1(i, a) for (int i = a; i >= 1; --i)
#define repd2(i, a, b) for (int i = b; i >= a; --i)
#define repd3(i, a, b, c) for (int i = b; i >= a; i-=c)
#define repd(...) overload4(__VA_ARGS__, repd3, repd2, repd1, repd0)(__VA_ARGS__)
#define trav(a, x) for (auto& a : x)

#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define st first
#define nd second
#define lb lower_bound
#define ub upper_bound
#define all(x) (x).begin(), (x).end()
#define ins insert

template<typename T> bool ckmin(T &a, const T &b) { return b < a ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int MOD = 1e9 + 7;
const int INF = 0x3fffffff;
const ll LINF = 0x1fffffffffffffff;
const char nl = '\n';
const int MX = 1e5 + 3;

void solve() {
  int n, k, r; cin >> n >> k >> r;
  vi a(n+1), ask(k, 0), cur(k+1, 0); rep(i, 1, n) cin >> a[i];
  int ans = INF, cnt = 0, idx = 1;
  rep(i, 1, r) {
    int b, q; cin >> b >> q;
    ask[b] = q;
  }
  rep(i, 1, n) {
    while (idx <= n && cnt != r) {
      int now = a[idx];
      cur[now]++; 
      if (cur[now] == ask[now]) cnt++;
      idx++;
    }
    if (cnt == r) ckmin(ans, idx-i);
    int now = a[i];
    if (cur[now] == ask[now]) cnt--;  
    cur[now]--;
  }
  cout << (ans == INF ? "impossible" : to_string(ans)) << nl;
}

int main(int argc, char* argv[]) {
  ios_base::sync_with_stdio(0); cin.tie(NULL);
  int t = 1;
  // cin >> t;
  while (t--) { solve(); }
  return 0;
}

Compilation message (stderr)

dna.cpp:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 32 / 32