제출 #1096349

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1096349		ducdev	Global Warming (CEOI18_glo)	C++14	10 / 100	85 ms	7780 KiB

glo

// Author: 4uckd3v - Nguyen Cao Duc
#include <bits/stdc++.h>
using namespace std;

#define all(x) (x).begin(), (x).end()

typedef long long ll;

const int MAX_N = 1e6;
const int MOD = 1e9 + 7;

int n;
ll a[MAX_N + 5], x;

struct FenwickTree {
    vector<int> bit;
    int n;

    void update(int pos, int val) {
        for (; pos <= n; pos += pos & (-pos))
            bit[pos] = max(bit[pos], val);
    };

    int get(int pos) {
        int ret = 0;
        for (; pos > 0; pos -= pos & (-pos))
            ret = max(ret, bit[pos]);
        return ret;
    };

    FenwickTree(int n) : n(n) {
        bit.assign(n + 5, 0);
    };
};

namespace SUBTASK_2 {
    const int N = MAX_N;

    ll c[N + 5];

    void Solve() {
        vector<ll> v;
        for (int i = 1; i <= n; i++) c[i] = a[i];
        for (int i = 1; i <= n; i++) v.push_back(c[i]);

        sort(all(v));
        v.resize(unique(all(v)) - v.begin());

        for (int i = 1; i <= n; i++) {
            c[i] = lower_bound(all(v), c[i]) - v.begin() + 1;
        };

        FenwickTree bit(n);
        int res = 0;
        for (int i = 1; i <= n; i++) {
            int dp = bit.get(c[i] - 1);
            bit.update(c[i], dp + 1);
            res = max(res, dp + 1);
        }

        cout << res << '\n';
    };
};  // namespace SUBTASK_2

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if (fopen("MAIN.INP", "r")) {
        freopen("MAIN.INP", "r", stdin);
        freopen("MAIN.OUT", "w", stdout);
    };

    cin >> n >> x;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    };

    if (x == 0)
        return SUBTASK_2::Solve(), 0;
};

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'int main()':
glo.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen("MAIN.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen("MAIN.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25