# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1184785 | countless | Robots (IOI13_robots) | C++20 | 0 ms | 0 KiB |
#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const ll MOD = 998244353;
const ll INF = 1e18;
const ld EPS = 1e-12;
#define endl "\n"
#define sp <<" "<<
#define REP(i, a, b) for(ll i = a; i < b; i++)
#define dbg(x) cout << #x << " = " << x << endl
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fast_io() ios_base::sync_with_stdio(false); cin.tie(NULL)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) ((ll)(x).size())
struct custom_hash {
static uint64_t splitmix64(uint64_t x) {
// http://xorshift.di.unimi.it/splitmix64.c
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
template <typename Key, typename Value>
using hash_map = unordered_map<Key, Value, custom_hash>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// uniform_int_distribution<int>(a, b)(rng);
// shuffle(all(a), rng);
struct toy {
ll weight, size, index;
};
bool compW(const toy &a, const toy &b) {
if (a.weight == b.weight) return a.size < b.size;
return a.weight < b.weight;
}
bool compS(const toy &a, const toy &b) {
if (a.size == b.size) return a.weight < b.weight;
return a.size < b.size;
}
int a, b, t;
vector<int> as, bs;
vector<toy> toysW, toysS;
vector<bool> vis;
bool helpe(int x) {
int rem = t, ind;
priority_queue<pair<int, int>> pq;
ind = 0;
REP(i, 0, a) {
while (ind < t && (vis[toysW[ind].index] || toysW[ind].weight < as[i])) {
if (!vis[toysW[ind].index])
pq.push({toysW[ind].size, toysW[ind].index});
ind++;
}
int cap = x;
while (!pq.empty() && cap) {
int ele = pq.top().second; pq.pop();
cap--, rem--;
vis[ele] = true;
}
}
priority_queue<pair<int, int>>().swap(pq);
ind = 0;
REP(i, 0, b) {
while (ind < t && (vis[toysS[ind].index] || toysS[ind].size < bs[i])) {
if (!vis[toysS[ind].index])
pq.push({toysS[ind].weight, toysS[ind].index});
ind++;
}
int cap = x;
while (!pq.empty() && cap) {
int ele = pq.top().second; pq.pop();
cap--, rem--;
vis[ele] = true;
}
}
return rem == 0;
}
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
a = A, b = B, t = T;
as.resize(a), bs.resize(b), toysW.resize(t), toysS.resize(t);
vis.assign(t, false);
REP(i, 0, a) {
as[i] = X[i];
}
if (a) sort(all(as));
REP(i, 0, b) {
bs[i] = Y[i];
}
if (b) sort(all(bs));
REP(i, 0, t) {
toysW[i] = toysS[i] = {W[i], S[i], i};
}
sort(all(toysW), compW);
sort(all(toysS), compS);
int l = -1, r = t+1;
while (l < r) {
int m = (l+r)/2;
if (helpe(m)) {
r = m;
} else {
l = m + 1;
}
vis.assign(t, false);
}
return l;
}
signed main() {
int a, b, t; cin >> a >> b >> t;
int x[a], y[b], w[t], s[t];
REP(i, 0, a) {
cin >> x[i];
}
REP(i, 0, b) {
cin >> y[i];
}
REP(i, 0, t) {
cin >> w[i] >> s[i];
}
cout << putaway(a, b, t, x, y, w, s) << endl;
}