Submission #547973

#	Time	Username	Problem	Language	Result	Execution time	Memory
547973		Jarif_Rahman	Martian DNA (BOI18_dna)	C++17	100 / 100	147 ms	137676 KiB

dna

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k, r; cin >> n >> k >> r;

    vector<int> v(n);
    for(int &x: v) cin >> x;

    vector<queue<int>> sth(k);
    vector<int> req(k, 0);

    for(int i = 0; i < r; i++){
        int b, q; cin >> b >> q;
        req[b] = q;
    }
    
    int tbo = r;
    set<int> ss;
    int ans = 1e9;

    for(int i = 0; i < n; i++){
        if(sth[v[i]].size() < req[v[i]]){
            sth[v[i]].push(i);
            ss.insert(i);
            if(sth[v[i]].size() == req[v[i]]) tbo--;
        }
        else if(req[v[i]] != 0){
            sth[v[i]].push(i);
            ss.insert(i);
            ss.erase(sth[v[i]].front());
            sth[v[i]].pop();
        }

        if(tbo == 0) ans = min(ans, i-*ss.begin()+1);
    }

    if(ans > n) cout << "impossible\n";
    else cout << ans << "\n";
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:31:29: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   31 |         if(sth[v[i]].size() < req[v[i]]){
dna.cpp:34:33: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   34 |             if(sth[v[i]].size() == req[v[i]]) tbo--;

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