149 lines
3.0 KiB
C++
149 lines
3.0 KiB
C++
/* Problem URL: https://codeforces.com/edu/course/2/lesson/4/2/practice/contest/273278/problem/C */
|
|
|
|
#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, class comp = less<>>
|
|
using ordered_set = tree<T, null_type , comp , rb_tree_tag , tree_order_statistics_node_update>;
|
|
|
|
#define V vector
|
|
|
|
#define rmin(a, b) a = min(a, b)
|
|
#define rmax(a, b) a = max(a, b)
|
|
|
|
#define rep(i, lim) for (int i = 0; i < (lim); i++)
|
|
#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
|
|
|
|
#define repv(i, v) for (auto &i : (v))
|
|
#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
|
|
#define sortv(v) sort(v.begin(), v.end())
|
|
#define all(v) (v).begin(), (v).end()
|
|
|
|
using vi = vector<int>;
|
|
using vvi = vector<vi>;
|
|
using vvvi = vector<vvi>;
|
|
using vvvvi = vector<vvvi>;
|
|
|
|
using ll = long long;
|
|
|
|
using vl = vector<ll>;
|
|
using vvl = vector<vl>;
|
|
using vvvl = vector<vvl>;
|
|
using vvvvl = vector<vvvl>;
|
|
|
|
template<class v>
|
|
auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
|
|
os << vec[0];
|
|
for (size_t i = 1; i < vec.size(); i++) {
|
|
os << ' ' << vec[i];
|
|
}
|
|
os << '\n';
|
|
return os;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator>>(istream &is, vector<v> &vec)->istream& {
|
|
for (auto &i : vec) {
|
|
is >> i;
|
|
}
|
|
return is;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
|
|
for (auto &i : vec) {
|
|
os << i[0];
|
|
for (size_t j = 1; j < i.size(); j++) {
|
|
os << ' ' << i[j];
|
|
}
|
|
os << '\n';
|
|
}
|
|
return os;
|
|
}
|
|
|
|
template<class v>
|
|
auto operator>>(istream &is, vector<vector<v>> &vec)->istream& {
|
|
for (auto &i : vec) {
|
|
for (auto &j : i) {
|
|
is >> j;
|
|
}
|
|
}
|
|
return is;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
ios::sync_with_stdio(false);
|
|
cin.tie(nullptr);
|
|
|
|
int n, m;
|
|
cin >> n >> m;
|
|
|
|
vl fds(n);
|
|
cin >> fds;
|
|
|
|
while (__builtin_popcount(n) != 1) {
|
|
n++;
|
|
fds.push_back(0);
|
|
}
|
|
|
|
vl seg(n * 2);
|
|
|
|
nrep(i, n, n * 2) {
|
|
seg[i] = fds[i - n];
|
|
}
|
|
|
|
for (int i = n - 1; i > 0; i--) {
|
|
seg[i] = max(seg[i * 2], seg[i * 2 + 1]);
|
|
}
|
|
|
|
auto update = [&](int i, ll v) {
|
|
seg[i + n] = v;
|
|
|
|
for (i = (i + n) >> 1; i > 0; i >>= 1) {
|
|
seg[i] = max(seg[i * 2], seg[i * 2 + 1]);
|
|
}
|
|
};
|
|
|
|
function<int(int, int, int, ll)> query = [&](int i, int l, int r, ll v) {
|
|
if (seg[i] < v) {
|
|
return -1;
|
|
}
|
|
|
|
if (l == r) {
|
|
return i - n;
|
|
}
|
|
|
|
int mid = (l + r) >> 1;
|
|
|
|
int ans = query(i * 2, l, mid, v);
|
|
if (ans == -1) {
|
|
return query(i * 2 + 1, mid + 1, r, v);
|
|
}
|
|
|
|
return ans;
|
|
};
|
|
|
|
while (m--) {
|
|
int op;
|
|
cin >> op;
|
|
|
|
if (op == 1) {
|
|
int i;
|
|
ll v;
|
|
cin >> i >> v;
|
|
update(i, v);
|
|
continue;
|
|
}
|
|
|
|
ll x;
|
|
cin >> x;
|
|
|
|
cout << query(1, 0, n - 1, x) << '\n';
|
|
}
|
|
}
|