Submission #758542

#TimeUsernameProblemLanguageResultExecution timeMemory
758542HanksburgerBubble Sort 2 (JOI18_bubblesort2)C++17
100 / 100
1998 ms53576 KiB
#include "bubblesort2.h" #include <bits/stdc++.h> using namespace std; int seg[4000005], lazy[4000005]; vector<pair<int, int> > vec; vector<int> ans; void push(int i, int l, int r) { if (l<r) { seg[i*2]+=lazy[i]; seg[i*2+1]+=lazy[i]; lazy[i*2]+=lazy[i]; lazy[i*2+1]+=lazy[i]; lazy[i]=0; } } void upd(int i, int l, int r, int ql, int qr, int val) { // cout << "update " << l << ' ' << r << ' ' << ql << ' ' << qr << ' ' << val << '\n'; // push(i, l, r); if (ql<=l && r<=qr) { seg[i]+=val; lazy[i]+=val; return; } int mid=(l+r)/2; if (ql<=mid && l<=qr) upd(i*2, l, mid, ql, qr, val); if (ql<=r && mid+1<=qr) upd(i*2+1, mid+1, r, ql, qr, val); seg[i]=max(seg[i*2], seg[i*2+1])+lazy[i]; // cout << "seg[" << i << "] = " << seg[i] << " after considering " << seg[i*2] << " and " << seg[i*2+1] << '\n'; } vector<int> countScans(vector<int> a, vector<int> x, vector<int> y) { int n=a.size(), m=x.size(); for (int i=0; i<n; i++) vec.push_back({a[i], i}); for (int i=0; i<m; i++) vec.push_back({y[i], x[i]}); sort(vec.begin(), vec.end()); vec.erase(unique(vec.begin(), vec.end()), vec.end()); int sz=vec.size(); // for (int i=0; i<sz; i++) // cout << vec[i].first << ' ' << vec[i].second << '\n'; for (int i=0; i<n; i++) { int ind=lower_bound(vec.begin(), vec.end(), make_pair(a[i], i))-vec.begin(); int ind2=lower_bound(vec.begin(), vec.end(), make_pair(a[i], 0))-vec.begin(); upd(1, 0, sz-1, ind, ind, i+1); upd(1, 0, sz-1, ind2, sz-1, -1); } // cout << "seg: " << '\n'; // for (int i=8; i<=15; i++) // cout << seg[i] << ' '; // cout << '\n'; // for (int j=1; j<=15; j++) // cout << j << ' ' << seg[j] << ' ' << lazy[j] << '\n'; for (int i=0; i<m; i++) { // cout << "i=" << i << '\n'; int ind=lower_bound(vec.begin(), vec.end(), make_pair(a[x[i]], x[i]))-vec.begin(); int ind2=lower_bound(vec.begin(), vec.end(), make_pair(a[x[i]], 0))-vec.begin(); upd(1, 0, sz-1, ind, ind, -x[i]-1); upd(1, 0, sz-1, ind2, sz-1, 1); a[x[i]]=y[i]; ind=lower_bound(vec.begin(), vec.end(), make_pair(a[x[i]], x[i]))-vec.begin(); ind2=lower_bound(vec.begin(), vec.end(), make_pair(a[x[i]], 0))-vec.begin(); upd(1, 0, sz-1, ind, ind, x[i]+1); upd(1, 0, sz-1, ind2, sz-1, -1); ans.push_back(seg[1]); // for (int j=1; j<=15; j++) // cout << j << ' ' << seg[j] << ' ' << lazy[j] << '\n'; } return ans; }
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