CSES-solutions/CSES Problem Set/Room Allocation.cpp
Segcolt 8b03716512 Add a lot more of my solutions.
I don't remember which ones doesn't pass though
2025-09-12 14:51:10 -03:00

127 lines
2.4 KiB
C++

/* Problem URL: https://cses.fi/problemset/task/1164 */
#include <bits/stdc++.h>
using namespace std;
#define V vector
#define rmin(a, b) a = min(a, b)
#define rmax(a, b) a = max(a, b)
#define rep(i, lim) for (size_t i = 0; i < (lim); i++)
#define nrep(i, s, lim) for (size_t 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;
cin >> n;
V<tuple<int, ll, ll>> cus(n);
map<ll, int> var;
size_t ind = 0;
for (auto &[i, a, b] : cus) {
cin >> a >> b;
var[a] = 0;
var[b] = 0;
i = ind;
ind++;
}
int v = 0;
for (auto &i : var) {
i.second = v;
v++;
}
V<tuple<ll, int, int>> act;
for (auto &[i, a, b] : cus) {
a = var[a];
b = var[b];
act.emplace_back(a, 0, i);
act.emplace_back(b, 1, i);
}
int k = 1;
priority_queue<int, vi, greater<>> pos;
for (size_t i = 1; i <= n; i++) {
pos.push(i);
}
vi ans(n);
sortv(act);
for (auto [a, yes, i] : act) {
if (!yes) {
ans[i] = pos.top();
pos.pop();
rmax(k, ans[i]);
} else {
pos.push(ans[i]);
}
}
cout << k << '\n';
cout << ans;
}