Submission #1237575

#TimeUsernameProblemLanguageResultExecution timeMemory
1237575orzngaihaExamination (JOI19_examination)C++20
0 / 100
3087 ms426192 KiB
#include <bits/stdc++.h> #define int long long using namespace std; int n, q; const int N = 1e5 + 5; struct Edge { int l, r, z, id; }; vector<Edge> d; pair<int, int> a[N], c[N]; int kq[N]; bool cmp(pair<int, int>& a, pair<int, int>& b) { return a.first + a.second > b.first + b.second; } bool cmp1(Edge& a, Edge& b) { return a.z > b.z; } map<int, int> bit[N]; void update(int x, int y, int v) { for (int i = x; i <= n; i += i & -i) { for (int j = y; j <= n; j += j & -j) { bit[i][j] += v; } } } int get(int x, int y) { int r = 0; for (int i = x; i > 0; i -= i & -i) { for (int j = y; j > 0; j -= j & -j) { r += bit[i][j]; } } return r; } signed main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin>>n>>q; vector<int> b; for (int i = 1; i <= n; i++) { cin >> a[i].first >> a[i].second; b.push_back(a[i].first); b.push_back(a[i].second); } sort(a + 1, a + 1 + n, cmp); d.resize(q + 1); for (int i = 1; i <= q; i++) { cin >> d[i].l >> d[i].r >> d[i].z; d[i].id = i; b.push_back(d[i].l); b.push_back(d[i].r); } sort(b.begin(), b.end()); b.erase(unique(b.begin(), b.end()), b.end()); n = b.size(); for (int i = 1; i <= n; i++) { int x = lower_bound(b.begin(), b.end(), a[i].first) - b.begin() + 1; int y = lower_bound(b.begin(), b.end(), a[i].second) - b.begin() + 1; c[i].first = n - x + 1; c[i].second = n - y + 1; } for (int i = 1; i <= q; i++) { int x = lower_bound(b.begin(), b.end(), d[i].l) - b.begin() + 1; int y = lower_bound(b.begin(), b.end(), d[i].r) - b.begin() + 1; d[i].l = n - x + 1; d[i].r = n - y + 1; } sort(d.begin() + 1, d.end(), cmp1); int t = 1; for (int i = 1; i <= q; i++) { while (t <= n and a[t].first + a[t].second >= d[i].z) { update(c[t].first, c[t].second, 1); t++; } kq[d[i].id] = get(d[i].l, d[i].r); } for (int i = 1; i <= q; i++) cout<<kq[i]<<'\n'; }
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