Submission #708112

#	Time	Username	Problem	Language	Result	Execution time	Memory
708112		swagchicken	trapezoid (balkan11_trapezoid)	C++14	40 / 100	329 ms	43572 KiB

trapezoid

#include <iostream>
#include <tuple>
#include <cmath>
#include <string>
#include <cstring>
#include <vector>
#include <deque>
#include <queue>
#include <stack>
#include <random>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <algorithm>
#include <vector>
#include <fstream>
#include <iomanip>
#include <ctime>
#include <cctype>
#include <climits>
#include <chrono>
 
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector< vector <int> > vvi;
typedef pair<int, int> pii;
typedef pair < pair < int, int >, int > piii;
typedef pair < pair <int, int > , pair <int, int> > piiii;
typedef pair<ll, ll> pll;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<string> vs;
 
#define FOR(i,a,b) for(int i = a; i < b; i ++)
#define RFOR(i,a,b) for(int i = a-1; i >= b; i --)
#define all(a) a.begin(), a.end()
#define endl '\n';
#define sz(x) (int)(x).size()
 
#define mp make_pair
#define pb push_back
#define ff first
#define ss second
 
template <typename T>
void pr(vector<T> &v) {
    FOR(i, 0, sz(v)) cout << v[i] << " ";
    cout << endl;
}
template <typename T>
void pr(vector<vector<T> > &v) {
    FOR(i, 0, sz(v)) { pr(v[i]); }
}
template <typename T>
void re(T &x) {
    cin >> x;
}
template <typename T>
void re(vector<T> &a) {
    FOR(i, 0, sz(a)) re(a[i]);
}
template <class Arg, class... Args>
void re(Arg &first, Args &... rest) {
    re(first);
    re(rest...);
}
template <typename T>
void pr(T x) {
    cout << x << endl;
}
template <class Arg, class... Args>
void pr(const Arg &first, const Args &... rest) {
    cout << first << " ";
    pr(rest...);
    cout << endl;
}
void ps() { cout << endl; }
template<class T, class... Ts>
void ps(const T& t, const Ts&... ts) {
    cout << t; if (sizeof...(ts)) cout << " "; ps(ts...);
}
 
const ll MOD  = 998244353;
#define inf 1e18;
#define INF INT_MAX

long double PI = 4*atan(1);
long double eps = 1e-12;


template<class T>
class FenwickTree {
    private:
        vector<T> ft;
    public:
        FenwickTree(int m) {
            ft.assign(m + 1, 0);
        }
        
        int LSOne(int x) {
            return x & (-x);
        }

        T RMQ(int j) {
            // this allows array to be 0 indexed while ft is 1 indexed
            j++;
            int maxv = 0;
            for(; j > 0; j -= LSOne(j)) {
                maxv = max(maxv, ft[j]);
            }
            return maxv;
        }
      
        
        void update(int i, T v) {
            i++;
            for(; i < ft.size(); i += LSOne(i)) {
                ft[i] = max(ft[i], v);
            }
        }
};


vector<pii> queries(210000, {-1e9, -1});
vector<pii> updates(210000, {-1e9, -1});

int main() {
    //auto start = chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);cin.tie(0);
    //ofstream cout("output.txt");
    //ifstream cin("input.txt");
    #ifdef DEBUG
      freopen("input.txt", "r", stdin);
      freopen("output.txt", "w", stdout);
    #endif  

    int n; cin >> n;
    vector<piiii> trap(n);
    set<int> topv, botv;
    map<int, int> topcmp;
    map<int, int> botcmp;
    FOR(i,0,n) {
      cin >> trap[i].ff.ff >> trap[i].ff.ss >> trap[i].ss.ff >> trap[i].ss.ss;
      
      topv.insert(trap[i].ff.ff); 
      topv.insert(trap[i].ff.ss);

      botv.insert(trap[i].ss.ff);
      botv.insert(trap[i].ss.ss);
    }

    int cnt = 0;
    for(int v : topv) {
      topcmp[v] = cnt; cnt++;
    }
    cnt = 0;
    for(int v : botv) {
      botcmp[v] = cnt; cnt++;
    }

    FOR(i,0,n) {
      queries[topcmp[trap[i].ff.ff]] = {botcmp[trap[i].ss.ff], i};
    }
    
    FenwickTree<int> st(210000);


    FOR(i,0,210000) {
      if(queries[i].ff != -1e9) {
        int curr = st.RMQ(queries[i].ff) + 1;
        int idx = queries[i].ss;
        updates[topcmp[trap[idx].ff.ss]] = {curr , idx};
      }
      if(updates[i].ff != -1e9) {
        int idx = updates[i].ss;
        int curr = updates[i].ff;
        st.update(botcmp[trap[idx].ss.ss], curr);
      }
    }

    int ans = st.RMQ(210000);
    cout << ans << " " << -1 << endl;


    //auto stop = chrono::high_resolution_clock::now();
    //auto duration = chrono::duration_cast<chrono::microseconds>(stop - start);
    //cout << duration.count() << endl;
    //cin.close();
    //cout.close();
}

Compilation message (stderr)

trapezoid.cpp: In instantiation of 'void FenwickTree<T>::update(int, T) [with T = int]':
trapezoid.cpp:180:48:   required from here
trapezoid.cpp:120:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |             for(; i < ft.size(); i += LSOne(i)) {
      |                   ~~^~~~~~~~~~~

• Subtask 1: 40 / 100