Submission #1097667

#	Time	Username	Problem	Language	Result	Execution time	Memory
1097667		Whisper	Gift Exchange (JOI24_ho_t4)	C++17	50 / 100	165 ms	11344 KiB

Main

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, a) for (int i = 0; i < (a); ++i)
#define REPD(i, a) for (int i = (a) - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/*
    Phu Trong from Nguyen Tat Thanh High School for gifted student
*/

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
#define MAX                         500005
int A[MAX], B[MAX];
int nArr, numQuery;

struct Queries{
    int l, r, id;
    Queries(){}
    Queries(int _l, int _r, int _id): l(_l), r(_r), id(_id){}
} Q[MAX];

namespace SUBTASK_4{
    bool check(void){
        return nArr <= 100000 && numQuery <= 10;
    }
    void main(void){
        auto solve = [&](int l, int r){
            vector<pair<int, int>> events;
            FOR(i, l, r){
                events.emplace_back(B[i], i);
                events.emplace_back(A[i], -i);
            }
            sort(events.begin(), events.end());
            int curLine = 0;
            for (int i = 0; i < (int)events.size(); ++i){
                if(events[i].second < 0) --curLine;
                else ++curLine;

                if(i > 0 && curLine == 0){
                    if(events[i].second == -events[i - 1].second) return false;
                }
            }
            return true;
        };

        for (int i = 1; i <= numQuery; ++i){
            cout << (solve(Q[i].l, Q[i].r) ? "Yes\n" : "No\n");
        }
    }
}
void process(void){
    cin >> nArr;
    for (int i = 1; i <= nArr; ++i) cin >> A[i];
    for (int i = 1; i <= nArr; ++i) cin >> B[i];

    cin >> numQuery;
    for (int i = 1; i <= numQuery; ++i){
        cin >> Q[i].l >> Q[i].r;
        Q[i].id = i;
    }

    if(SUBTASK_4 :: check()) {
        SUBTASK_4 :: main();
        return;
    }


}
signed main(){
    #define name "Whisper"
    cin.tie(nullptr) -> sync_with_stdio(false);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    process();
    return (0 ^ 0);
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 31 / 31
• Subtask 5: 0 / 8
• Subtask 6: 0 / 12
• Subtask 7: 0 / 18
• Subtask 8: 0 / 12