Submission #1051264

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051264		LilPluton	Circle Passing (EGOI24_circlepassing)	C++14	100 / 100	68 ms	13468 KiB

Main

#include <bits/stdc++.h>
/// author: LilPluton auuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
using namespace std;
#define ll long long
#define ld long double
#define ar array
#define int ll
#define vt vector
#define pb push_back
#define all(c) (c).begin(), (c).end()
#define sz(x) (int)(x).size()
#define endll   '\n'

#define F_OR(i, a, b, s) for (int i=(a); (s)>0?i<(b):i>(b); i+=(s))
#define F_OR1(e) F_OR(i, 0, e, 1)
#define F_OR2(i, e) F_OR(i, 0, e, 1)
#define F_OR3(i, b, e) F_OR(i, b, e, 1)
#define F_OR4(i, b, e, s) F_OR(i, b, e, s)
#define GET5(a, b, c, d, e, ...) e
#define F_ORC(...) GET5(__VA_ARGS__, F_OR4, F_OR3, F_OR2, F_OR1)
#define FOR(...) F_ORC(__VA_ARGS__)(__VA_ARGS__)
#define EACH(x, a) for (auto& x: a)
     
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};
struct BIT
{
    long long n;
    vector<long long> ft;
    BIT(long long N)
    {
        n = N;
        ft.assign(n + 5, 0);
    }
    void upd(long long pos, long long val)
    {
        while(pos <= n)
        {
            ft[pos] += val;
            pos += (pos & (-pos));
        }
        
    }
    long long sum(long long l, long long r)
    {
        if(l != 1)  return sum(1, r) - sum(1, l - 1);
        long long res = 0;
        while(r >= 1)
        {
            res +=  ft[r];
            r += (r | (-r));
        }
        return res;
    }
};
struct DSU
{
    vector<int>par, size;
    int n;
    DSU(int N)
    {
        n = N + 5;
        par.resize(n + 1, 0);
        size.assign(n + 1, 1);
        for(int i = 0; i <= n; ++i)
            par[i] = i;
    }
    int _find(int v)
    {
        if(par[v] == v)
            return v;
        return par[v] = _find(par[v]);
    }
    bool unite(int a, int b)
    {
        a = _find(a);
        b = _find(b);
        if(a != b)
        {
            if(size[a] < size[b])
                swap(a, b);
            size[a] += size[b];
            par[b] = a;
            return 1;
        }
        return 0;
    }
};
const long long INF = 1e18;
const int N = 2e5 + 5;
const int L = 20;
int n;

int calc(int a,int b)
{
    return min({abs(a - b), 2 * n - abs(a - b)});
}

int dist(int a,int b, ar<int,2> c)
{
    return 1 + min(calc(a, c[0]) + calc(b, c[1]), calc(a, c[1]) + calc(b, c[0]));
}


void solve(int test_case) {
    int m, q;
    cin >> n >> m >> q;
    vector<int>v;
    FOR(m)
    {
        int x;
        cin >> x;
        v.push_back(x);
        v.push_back(n + x);
    }
    sort(all(v));
    FOR(q)
    {
        int l, r;
        cin >> l >> r;
        int ans = calc(l, r);
        vector<ar<int,2>> s;

        auto it = lower_bound(all(v), l);
        if(it != v.end())
        {
            s.push_back({*it, (*it + n) % (n * 2)});
        }
        if(it != v.begin())
        {
            --it;
            s.push_back({*it, (*it + n) % (n * 2)});
        }
        it = lower_bound(all(v), r);
        if(it != v.end())
        {
            s.push_back({*it, (*it + n) % (n * 2)});
        }
        if(it != v.begin())
        {
            --it;
            s.push_back({*it, (*it + n) % (n * 2)});
        }
        for(auto f : s) ans = min({ans, dist(l, r, f)});
        cout << ans << endll;
    }
}



main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    int t = 1;
    for(int i = 1; i <= t; ++i)
        solve(i);
    return 0;
}

Compilation message (stderr)

Main.cpp:152:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  152 | main() {
      | ^~~~

• Subtask 1: 14 / 14
• Subtask 2: 20 / 20
• Subtask 3: 22 / 22
• Subtask 4: 17 / 17
• Subtask 5: 27 / 27