Submission #934763

#	Time	Username	Problem	Language	Result	Execution time	Memory
934763		Whisper	Exhibition (JOI19_ho_t2)	C++17	100 / 100	44 ms	7852 KiB

joi2019_ho_t2

#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, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)
#define pii pair<int , int>
#define Lg(x) 31 - __builtin_clz(x)

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

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int MAX = 2e5 + 5;
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

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;
    }
int numPic, nFrame;
pair<int, int> a[MAX];
int b[MAX];
void Whisper(){
    cin >> numPic >> nFrame;
    for (int i = 1; i <= numPic; ++i) cin >> a[i].first >> a[i].second;
    for (int i = 1; i <= nFrame; ++i) cin >> b[i];

    sort(a + 1, a + numPic + 1, [&](const pair<int, int>&a, const pair<int, int>& b){
        if (a.second == b.second) return a.first < b.first;
        return a.second < b.second;
    });
    sort(b + 1, b + nFrame + 1);

    int ans = 0;
    int j = numPic;
    for (int i = nFrame; i >= 1; --i){
        while (j > 0 && a[j].first > b[i]) --j;
        if (a[j].first <= b[i] && j > 0){
            ++ans; --j;
        }
    }
    cout << ans;
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50