#include<bits/stdc++.h>
using namespace std;
#define i64 long long
#define i128 __int128
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()
i64 a[300005];
struct Tree {
const i64 INF = 1e18;
struct Data {
i64 lf, rg, ans;
};
vector<Data> st;
Tree (int _N) : st(4 * _N + 4) {}
Data combine(Data lf, Data rg) {
Data res;
res.lf = lf.lf;
res.rg = rg.rg;
res.ans = lf.ans + rg.ans + (lf.rg > rg.lf);
return res;
}
void build(int id, int l, int r) {
if (l == r) {
st[id].lf = st[id].rg = a[l];
st[id].ans = 0;
return;
}
int mid = (l + r)/2;
build(id * 2, l, mid);
build(id * 2 + 1, mid + 1, r);
st[id] = combine(st[id * 2], st[id * 2 + 1]);
}
void update(int id, int l, int r, int p, i64 x) {
if (p < l || p > r) return;
if (l == r) {
st[id].lf = st[id].rg = x;
st[id].ans = 0;
return;
}
int mid = (l + r)/2;
update(id * 2, l, mid, p, x);
update(id * 2 + 1, mid + 1, r, p, x);
st[id] = combine(st[id * 2], st[id * 2 + 1]);
}
Data get(int id, int l, int r, int u, int v) {
if (v < l || u > r) return {-INF, INF, 0};
if (u <= l && r <= v) return st[id];
int mid = (l + r)/2;
return combine(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}
};
void Solve(void) {
int N, Q; cin >> N >> Q;
Tree T(N + 2);
for (int i = 1; i <= N; i ++) cin >> a[i];
T.build(1, 1, N);
// cout << T.st[1].ans << "\n";
while (Q --) {
int x, v; cin >> x >> v;
a[++ x] = v;
T.update(1, 1, N, x, a[x]);
// cout << x << " " << a[x] << "\n";
cout << T.st[1].ans << "\n";
}
}
signed main() {
ios_base::sync_with_stdio(false); cin.tie(0);
cout << fixed << setprecision(10);
int Tests = 1; // cin >> Tests;
while (Tests --) {
Solve();
}
}
Compilation message
/usr/bin/ld: /tmp/ccTzSqHj.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc15rakg.o:bubblesort2.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccTzSqHj.o: in function `main':
grader.cpp:(.text.startup+0x181): undefined reference to `countScans(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status
