Submission #709480

#	Time	Username	Problem	Language	Result	Execution time	Memory
709480		stevancv	Martian DNA (BOI18_dna)	C++14	100 / 100	188 ms	143160 KiB

dna

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 5;
const int inf = 1e9;
const int mod = 1e9 + 7;
deque<int> dq[N];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m, k;
    cin >> n >> m >> k;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    vector<int> b(m);
    for (int i = 0; i < k; i++) {
        int x, y;
        cin >> x >> y;
        b[x] = y;
    }
    set<int> s;
    int dobri = 0;
    int ans = 1e6;
    for (int i = 0; i < n; i++) {
        if (b[a[i]] == 0) continue;
        dq[a[i]].push_back(i);
        if (dq[a[i]].size() > b[a[i]]) {
            s.erase(dq[a[i]].front());
            dq[a[i]].pop_front();
            s.insert(dq[a[i]].front());
        }
        else if (dq[a[i]].size() == b[a[i]]) {
            s.insert(dq[a[i]].front());
            dobri += 1;
        }
        if (dobri == k) smin(ans, i - *s.begin() + 1);
    }
    if (ans == 1e6) cout << "impossible" << en;
    else cout << ans << en;
    return 0;
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:33:29: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   33 |         if (dq[a[i]].size() > b[a[i]]) {
dna.cpp:38:34: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   38 |         else if (dq[a[i]].size() == b[a[i]]) {

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