Submission #364121

#	Time	Username	Problem	Language	Result	Execution time	Memory
364121		Andyvanh1	Martian DNA (BOI18_dna)	C++14	100 / 100	40 ms	4972 KiB

dna

using namespace std;


// 17.4.1.2 Headers

// C


#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>

#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>

#if __cplusplus >= 201103L
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif

void solve(){
    int n, k, r;
    cin>>n>>k>>r;
    vector<int> arr(n);
    for(int i = 0; i < n; i++){
        cin>>arr[i];
    }
    vector<int> need(n);
    for(int i = 0; i < n; i++){
        need[i] = 0;
    }
    for(int i = 0; i < r; i++){
        int a, b;
        cin>>a>>b;
        need[a] = b;
    }

    vector<int> has(n);
    for(int i = 0; i < n; i++){
        has[i] = 0;
    }

    int first = 0;
    int last = -1;
    int flex = r;
    int ans = 1000000;
    while(first!=n||last!=n-1){
        if(last==n-1&&flex!=0){
            break;
        }
        if(flex==0){
            ans = min(ans,last-first+1);
            has[arr[first]]--;
            if(has[arr[first]]<need[arr[first]]){
                flex++;
            }
            first++;
        }else{
            last++;
            has[arr[last]]++;
            if(has[arr[last]]==need[arr[last]]){
                flex--;
            }
        }

    }

    if(ans==1000000){
        cout<<"impossible";
    }else{
        cout<<ans;
    }


}



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





    int tc = 1;
//read(tc);

    while(tc--) {
        //write("Case #", i+1, ": ");
        solve();

    }
}

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