#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#define F first
#define S second
#define forn(i, n) for(int i = 0; i < n; ++i)
#define forbn(i, b, n) for(int i = b; i < n; ++i)
#define sz(v) (int)v.size()
#define pb push_back
#define eb emplace_back
#define all(v) v.begin(), v.end()
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef long long ll;
typedef tree<ii, null_type, less<ii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
template <class T> inline void mineq(T &a, T b) { a = min(a, b); }
template <class T> inline void maxeq(T &a, T b) { a = max(a, b); }
const int INF = 1000 * 1000;
struct Seg {
int n;
vi add, mx;
Seg(int n, vi &vals): n(n) {
add.assign(4 * n, 0);
mx.assign(4 * n, 0);
build(vals);
}
void propagate(int v, int tl, int tr) {
if(tl == tr || add[v] == 0)
return;
add[2 * v] += add[v];
add[2 * v + 1] += add[v];
mx[2 * v] += add[v];
mx[2 * v + 1] += add[v];
add[v] = 0;
}
void pull(int v) {
mx[v] = max(mx[2 * v], mx[2 * v + 1]);
}
void build(vi &vals, int v = 1, int tl = 0, int tr = -1) {
if(tr == -1) tr = n - 1;
if(tl == tr) {
mx[v] = vals[tl];
return;
}
int tm = (tl + tr) / 2;
build(vals, 2 * v, tl, tm);
build(vals, 2 * v + 1, tm + 1, tr);
pull(v);
}
void update(int l, int r, int val, int v = 1, int tl = 0, int tr = -1) {
if(tr == -1) tr = n - 1;
propagate(v, tl, tr);
if(l > r) return;
if(tl == l && r == tr) {
add[v] = val;
mx[v] += val;
return;
}
int tm = (tl + tr) / 2;
update(l, min(r, tm), val, 2 * v, tl, tm);
update(max(l, tm + 1), r, val, 2 * v + 1, tm + 1, tr);
pull(v);
}
int query(int l, int r, int v = 1, int tl = 0, int tr = -1) {
if(tr == -1) tr = n - 1;
propagate(v, tl, tr);
if(l > r) return -INF;
if(tl == l && r == tr)
return mx[v];
int tm = (tl + tr) / 2;
int ql = query(l, min(r, tm), 2 * v, tl, tm);
int qr = query(max(l, tm + 1), r, 2 * v + 1, tm + 1, tr);
return max(ql, qr);
}
int get_max() {
return query(0, n - 1);
}
int at(int p) {
return query(p, p);
}
void set(int p, int nval) {
update(p, p, nval - at(p));
}
};
ordered_set cur_vals;
vi countScans(vi a, vi xs, vi vs) {
int n = sz(a);
int q = sz(xs);
set<ii> s;
vii vals;
forn(i, n) {
s.insert({a[i], i});
vals.eb(a[i], i);
cur_vals.insert(vals.back());
}
forn(i, q) {
s.insert({vs[i], xs[i]});
}
map<ii, int> p2ind;
for(ii el: s) {
p2ind[el] = sz(p2ind);
}
int N = sz(s);
sort(all(vals));
vi seg_vals(N, -INF);
forn(i, n) {
int ind = p2ind[vals[i]];
seg_vals[ind] = vals[i].S - i;
}
Seg seg(N, seg_vals);
vi ans(q);
forn(i, q) {
int x = xs[i], v = vs[i];
int ind_fr = p2ind[{a[x], x}];
int ind_to = p2ind[{v, x}];
cur_vals.erase({a[x], x});
cur_vals.insert({v, x});
if(ind_to > ind_fr) {
seg.update(ind_fr, ind_to, 1);
}
if(ind_to < ind_fr) {
seg.update(ind_to, ind_fr, -1);
}
if(ind_to != ind_fr) {
int rem = x - cur_vals.order_of_key({v, x});
seg.set(ind_fr, -INF);
seg.set(ind_to, rem);
}
a[x] = v;
ans[i] = seg.get_max();
}
return ans;
}
void solve() {
int n, q;
cin >> n >> q;
vi a(n);
forn(i, n)
cin >> a[i];
vi xs, vs;
forn(_, q) {
int x, v;
cin >> x >> v;
xs.pb(x);
vs.pb(v);
}
vi ans = countScans(a, xs, vs);
for(int a: ans)
cout << a << endl;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
// cout.tie(nullptr);
// freopen("optmilk.in", "r", stdin);
// freopen("optmilk.out", "w", stdout);
int t = 1;
// cin >> t;
while(t--) {
solve();
}
}
Compilation message
/usr/bin/ld: /tmp/ccFYXjdY.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc3G9IkX.o:bubblesort2.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
