제출 #1290898

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1290898		moha1111	Martian DNA (BOI18_dna)	C++20	100 / 100	34 ms	5100 KiB

dna

#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#include <cstdio>
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define all(a) a.begin() , a.end()
const long long mod = 1000000007;
using namespace std;
#define int long long
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
typedef tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>indexed_multiset;

void usaco(string s)
{
	freopen((s + ".in").c_str(), "r", stdin);
	freopen((s + ".out").c_str(), "w", stdout);
}

void solve()
{
    int n , k , r;
    cin >> n >> k >> r;
    int a[n];
    vector<int> cun(k + 1 , 0);
    for(int i = 0 ; i < n ; i++)
        cin >> a[i];

    for(int i = 0 ; i < r ; i++)
    {
        int b , c;
        cin >> b >> c;
        cun[b] += c;
    }
    int st = 0 , en = n , ans = -1;
    while(st <= en)
    {
        vector<int> cur = cun;
        int ok = 0 , rem = accumulate(all(cur) , 0);
        int mid = (st + en) / 2;
        for(int i = 0 ; i < mid ; i++)
        {
            if(cur[a[i]] > 0)
                rem--;

            cur[a[i]]--;
        }
        ok |= (rem == 0);
        for(int i = mid ; i < n ; i++)
        {
            if(cur[a[i - mid]] >= 0)
                rem++;

            cur[a[i - mid]]++;
            if(cur[a[i]] > 0)
                rem--;

            cur[a[i]]--;
            ok |= (rem == 0);
        }
        if(ok)
            ans = mid , en = mid - 1;

        else
            st = mid + 1;
    }
    if(ans == -1)
        cout << "impossible";

    else
        cout << ans;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    // usaco("triangles");
    int t = 1;
    // cin >> t;
    while(t--)
        solve();

}

컴파일 시 표준 에러 (stderr) 메시지

dna.cpp: In function 'void usaco(std::string)':
dna.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen((s + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dna.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen((s + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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