Submission #1234857

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234857		CodeLakVN	Kralj (COCI16_kralj)	C++20	140 / 140	321 ms	43296 KiB

kralj

#include <bits/stdc++.h>
using namespace std;

#define task "main"
#define no "NO"
#define yes "YES"
#define F first
#define S second
#define vec vector
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)

const int MAX_N = (int)5e5 + 5;

int n;
int a[MAX_N], b[MAX_N];
vector<int> here[MAX_N];
int cnt[MAX_N];

void solve() {
    cin >> n;
    FOR(i, 1, n) {
        int idx; cin >> idx;
        here[idx].push_back(i);
        cnt[idx]++;
    }
    FOR(i, 1, n) cin >> b[i];
    FOR(i, 1, n) cin >> a[i];

    int startPoint = -1;
    FOR(i, 1, n - 1) {
        if (cnt[i] <= 1) {
            startPoint = i;
            continue;
        }
        cnt[i + 1] += cnt[i] - 1;
        cnt[i] = 1;
    }
    if (cnt[n] <= 1) startPoint = n;
    startPoint++;
    if (startPoint > n) startPoint = 1;

    set<int> s;
    int i = startPoint, ans = 0;
    while (true) {
        for (int j : here[i]) s.insert(a[j]);
        auto it = s.upper_bound(b[i]);
        if (it == s.end()) s.erase(s.begin());
        else ans++, s.erase(it);
        i++;
        if (i > n) i -= n;
        if (i == startPoint) break;
    }

    cout << ans;
}

int32_t main() {
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    bool multitest = 0;
    int numTest = 1;
    if (multitest) cin >> numTest;

    while (numTest--) {
        solve();
    }

    return 0;
}

/* Lak lu theo dieu nhac!!!! */

Compilation message (stderr)

kralj.cpp: In function 'int32_t main()':
kralj.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kralj.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140