Submission #782376

#	Time	Username	Problem	Language	Result	Execution time	Memory
782376		sadsa	Finding Routers (IOI20_routers)	C++17	100 / 100	1 ms	680 KiB

routers

#include "routers.h"
#include <bits/stdc++.h>
using namespace std;

using vi = vector<int>;
using ii = pair<int, int>;
using vii = vector<ii>;

using i64 = int64_t;
using vl = vector<i64>;
using ll = pair<i64, i64>;
using vll = vector<ll>;

constexpr int iINF = numeric_limits<int>::max();
constexpr i64 lINF = numeric_limits<i64>::max();

#define RANGE(x) begin(x), end(x)

template <typename... T>
void DBG(T&&... args) {
    ((cerr << args << ' '), ...) << '\n';
}

template <typename T>
ostream &operator<<(ostream &out, const vector<T> &vec) {
    out << '{';
    for (size_t i = 0; i < vec.size()-1; ++i)
        out << vec[i] << ", ";
    out << vec.back() << '}';
    return out;
}

template <typename T1, typename T2>
ostream &operator<<(ostream &out, const pair<T1, T2> &pr) {
    out << '(' << pr.first << ", " << pr.second << ')';
    return out;
}

std::vector<int> find_routers(int l, int n, int q) {
	std::vector<int> ans(n, 0);
	vi queries(l);
	iota(RANGE(queries), 0);

	int prv = 0;
	for (int i = 1; i < n; ++i) {
		int border = lower_bound(queries.begin(), queries.end(), i, [&] (const int a, int b) {
			int x = a;
			if (x > 0) queries[a] = x = -use_detector(a);
			return -x < b;
		}) - queries.begin() - 1;

		int dist = border - prv;
		int nxt = border + dist;
		ans[i] = nxt;
		prv = nxt;
	}

	return ans;
}

• Subtask 1: 16 / 16
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 40 / 40