Submission #1111282

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111282		thangdz2k7	Martian DNA (BOI18_dna)	C++17	100 / 100	25 ms	2640 KiB

dna

// author : thembululquaUwU
// 3.9.2024

#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define endl '\n'

using namespace std;
using ll = long long;
using ii = pair <int, int>;
using vi = vector <int>;

const int MaxN = 2e5;
const int mod = 1e9 + 7;

void maxl(auto &a, auto b) {a = max(a, b);}
void minl(auto &a, auto b) {a = min(a, b);}

void solve(){
    int n, k, r; cin >> n >> k >> r;
    vector <int> d(n);
    for (int &f : d) cin >> f;
    vector <int> needs(k, 0);
    while (r --){
        int B, Q; cin >> B >> Q;
        needs[B] = Q;
    }

    int numok = 0;
    vector <int> cnt(k, 0);
    for (int i = 0; i < k; ++ i) numok += (cnt[i] >= needs[i]);

    auto update = [&](int type, int val) -> void {
        numok -= (cnt[type] >= needs[type]);
        cnt[type] += val;
        numok += (cnt[type] >= needs[type]);
    };

    r = 0; int ans = mod;
    for (int l = 0; l < n; ++ l){
        while (numok < k && r < n) update(d[r ++], 1);
        if (numok == k) minl(ans, r - l);
        update(d[l], -1);
    }

    if (ans < mod) cout << ans;
    else cout << "impossible";
}

int main(){
    if (fopen("dna.inp", "r")){
        freopen("dna.inp", "r", stdin);
        freopen("dna.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int t = 1; // cin >> t;
    while (t --) solve();
    return 0;
}

Compilation message (stderr)

dna.cpp:18:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   18 | void maxl(auto &a, auto b) {a = max(a, b);}
      |           ^~~~
dna.cpp:18:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   18 | void maxl(auto &a, auto b) {a = max(a, b);}
      |                    ^~~~
dna.cpp:19:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void minl(auto &a, auto b) {a = min(a, b);}
      |           ^~~~
dna.cpp:19:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void minl(auto &a, auto b) {a = min(a, b);}
      |                    ^~~~
dna.cpp: In function 'int main()':
dna.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen("dna.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
dna.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen("dna.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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