Submission #785316

#	Time	Username	Problem	Language	Result	Execution time	Memory
785316		drdilyor	Highway Tolls (IOI18_highway)	C++17	0 / 100	86 ms	7116 KiB

highway

#include <bits/stdc++.h>
#include "highway.h"
#ifdef ONPC
    #include "t_debug.cpp"
#else
    #define debug(...) 42
#endif
using namespace std;
//namespace pbds = __gnu_pbds;
using ll = long long;
const int inf = 1e9;
const ll infl = 1e18;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U>& p) { return is >> p.first >> p.second; }
template<typename Cont> int sz(const Cont& cont) { return int(cont.size()); }
// template<typename Func> struct ycom { Func f; template<typename... T> auto operator()(T&&... args) { return f(*this, args...); } }; template<typename Func> ycom(Func) -> ycom<Func>;
template<typename T> typename vector<T>::iterator operator+(const vector<T>& x, int i) { return x.begin() + i ;};
const string fileio = "";
constexpr int tests = 1, nmax = 2e5, nlog = __lg(nmax), mod = 1e9+7;

void find_pair(int32_t n, std::vector<int32_t> u, std::vector<int32_t> v, int32_t a, int32_t b) {
    int m = u.size();
    vector<vector<pair<int,int>>> adj(n);

    for (int i = 0; i < m; i++) {
        adj[u[i]].emplace_back(v[i], i);
        adj[v[i]].emplace_back(u[i], i);
    }

    int base = ask(vector(m, 0));
    int l = 0, r = n;
    while (l < r-1) {
        int mid = (l + r) / 2;
        vector<int> w(n-1);
        fill(w.begin(), w.begin() + mid, 1);
        if (ask(w) == base) {
            l = mid;
        } else r = mid;
    }

    int s = l;

    l = 0, r = n;
    while (l < r-1) {
        int mid = (l + r) / 2;
        vector<int> w(n-1);
        fill(w.begin(), w.begin() + mid, 1);
        reverse(w.begin(), w.end());
        if (ask(w) == base) l = mid;
        else r = mid;
    }

    answer(s, n - 1 - l);
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31