Submission #518656

#	Time	Username	Problem	Language	Result	Execution time	Memory
518656		SmolBrain	Examination (JOI19_examination)	C++17	100 / 100	2228 ms	175440 KiB

examination

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

typedef long long int ll;
typedef long double ld;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define endl '\n'
#define pb push_back
#define conts continue
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define ff first
#define ss second
#define ceil2(x,y) ((x+y-1) / (y))
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#ifndef ONLINE_JUDGE
#define debug(x) cout << #x <<" = "; print(x); cout << endl
#else
#define debug(x)
#endif

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define trav(i,a) for(auto &i : a)

bool iseven(ll n) {if ((n & 1) == 0) return true; return false;}

void print(ll t) {cout << t;}
void print(int t) {cout << t;}
void print(string t) {cout << t;}
void print(char t) {cout << t;}
void print(double t) {cout << t;}
void print(ld t) {cout << t;}

template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(pair <T, V> p) {cout << "{"; print(p.ff); cout << ","; print(p.ss); cout << "}";}
template <class T> void print(vector <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T> void print(set <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T> void print(multiset <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T, class V> void print(map <T, V> v) {cout << "[ "; for (auto i : v) {print(i); cout << " ";} cout << "]";}

void usaco(string filename) {
    freopen((filename + ".in").c_str(), "r", stdin);
    freopen((filename + ".out").c_str(), "w", stdout);
}

const int MOD = 1e9 + 7;
const int maxn = 1e5 + 5;
const int inf1 = 1e9 + 5;
const ll inf2 = ll(1e18) + 5;

int cnt = 0;

template<typename T, int sp>
struct segtree {
    /*=======================================================*/

    struct data {
        Tree<pair<int, int>> os;
    };

    data neutral = {};

    void merge(data &curr, data &left, data &right) {

    }

    void create(int x, int lx, int rx, T v) {

    }

    void modify(int x, int lx, int rx, T v) {

    }

    /*=======================================================*/

    int siz = 1;
    vector<data> tr;

    segtree(int n) {
        init(n);
    }

    segtree() {

    };

    void init(int n) {
        while (siz < n) siz *= 2;
        tr.assign(2 * siz, neutral);
    }

    void build(vector<T> &a, int n, int x, int lx, int rx) {
        if (rx - lx == 1) {
            if (lx >= sp and lx < n) {
                create(x, lx, rx, a[lx]);
            }

            return;
        }

        int mid = (lx + rx) / 2;

        build(a, n, 2 * x + 1, lx, mid);
        build(a, n, 2 * x + 2, mid, rx);

        merge(tr[x], tr[2 * x + 1], tr[2 * x + 2]);
    }

    void build(vector<T> &a, int n) {
        build(a, n, 0, 0, siz);
    }

    void pupd(int i, T v, int x, int lx, int rx) {
        if (rx - lx == 1) {
            tr[x].os.insert({v, cnt});
            cnt++;
            return;
        }

        int mid = (lx + rx) / 2;

        if (i < mid) {
            pupd(i, v, 2 * x + 1, lx, mid);
        }
        else {
            pupd(i, v, 2 * x + 2, mid, rx);
        }

        tr[x].os.insert({v, cnt});
    }

    void pupd(int i, T v) {
        pupd(i, v, 0, 0, siz);
    }

    int query(int l, int r, int k, int x, int lx, int rx) {
        if (lx >= r or rx <= l) return 0;
        if (lx >= l and rx <= r){
            auto &curr = tr[x].os;
            int less = curr.order_of_key({k, -inf1});
            int res = sz(curr) - less;
            return res;
        }

        int mid = (lx + rx) / 2;

        int curr;
        int left = query(l, r, k, 2 * x + 1, lx, mid);
        int right = query(l, r, k, 2 * x + 2, mid, rx);

        curr = left + right;
        return curr;
    }

    int query(int l, int r, int k) {
        return query(l, r + 1, k, 0, 0, siz);
    }
};

void solve(int test_case)
{
    int n, q; cin >> n >> q;
    vector<pair<int, int>> a(n);
    rep(i, n) cin >> a[i].ff >> a[i].ss;

    auto comp = [&](pair<int, int> &p1, pair<int, int> &p2) {
        if (p1.ff + p1.ss > p2.ff + p2.ss) {
            return true;
        }

        return false;
    };

    sort(all(a), comp);

    vector<array<int, 4>> queries(n);
    rep(i, q) {
        int x, y, z; cin >> x >> y >> z;
        queries[i] = {z, x, y, i};
    }

    sort(rall(queries));

    vector<int> b;
    rep(i, n) b.pb(a[i].ff);
    rep(i, q) b.pb(queries[i][1]);

    sort(all(b));
    auto it = unique(all(b));
    b.resize(it - b.begin());
    int siz = sz(b);

    segtree<int,0> st(siz + 5);
    int ptr = 0;
    vector<int> ans(q);

    rep(i, q) {
        auto [z, x, y, id] = queries[i];

        while (ptr < n) {
            int sum = a[ptr].ff + a[ptr].ss;
            if (sum < z) break;

            int idx = lower_bound(all(b), a[ptr].ff) - b.begin();
            st.pupd(idx, a[ptr].ss);

            ptr++;
        }

        x = lower_bound(all(b), x) - b.begin();
        int res = st.query(x, siz, y);
        ans[id] = res;
    }

    rep(i, q) cout << ans[i] << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;
    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Compilation message (stderr)

examination.cpp: In function 'void usaco(std::string)':
examination.cpp:56:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |     freopen((filename + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     freopen((filename + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57