Submission #1058176

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058176		Mr_Husanboy	Circle Passing (EGOI24_circlepassing)	C++17	100 / 100	40 ms	6004 KiB

Main

//#pragma GCC optimize("Ofast,O3")
//#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
using namespace std;



#ifdef LOCAL
#include "debugger.cpp"
#else
#define debug(...)
#endif
template<class T>
int len(T &a){
    return a.size();
}

using ll = long long;
using pii = pair<int,int>;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
string fileio = "";

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const int MOD = 1e9 + 7;
const int inf = 1e9;
const ll infl = 1e18;
const int maxn = 1e5 + 1;





void yesno(bool ok){
    cout << (ok ? "Yes\n" : "No\n");
}


void solve(){
    int n; cin >> n;
    int m; cin >> m;
    int q; cin >> q;
    vector<int> fr(m);
    for(int i = 0; i < m; i ++) cin >> fr[i];
    for(int i = 0; i < m; i ++) fr.push_back(fr[i] + n);

    auto dis = [&](int a, int b){
        if(a > b) swap(a, b);
        return min(b - a, a + 2 * n - b);
    };

    while(q --){
        int a, b; cin >> a >> b;
        int ans = dis(a, b);
        auto it = upper_bound(all(fr), a) - fr.begin();
        int i = fr[it % len(fr)];
        it --; if(it < 0) it = len(fr) - 1;
        int j = fr[it];
        ans = min({ans, dis(a, i) + dis((i + n) % (n + n), b) + 1, dis(a, j) + dis((j + n) % (2 * n), b) + 1});
        cout << ans << '\n';
    }
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    auto start = chrono::high_resolution_clock::now();
    #ifndef LOCAL
    if(fileio.size()){
        freopen((fileio + ".in").c_str(), "r", stdin);
        freopen((fileio + ".out").c_str(), "w", stdout);
    }
    #endif
    int testcases = 1;
    #ifdef Tests
    cin >> testcases;
    #endif
    while(testcases --){
        solve();
        if(testcases) cout << '\n';
        #ifdef LOCAL
        else cout << '\n';
        cout << "_________________________" << endl;
        #endif
    }
    #ifdef LOCAL
    auto duration = chrono::duration_cast<chrono::microseconds>(chrono::high_resolution_clock::now() - start);
    
    cout << "time: " << (double)duration.count()/1000.0 << " milliseconds" << endl;
    #endif
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:67:10: warning: variable 'start' set but not used [-Wunused-but-set-variable]
   67 |     auto start = chrono::high_resolution_clock::now();
      |          ^~~~~
Main.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen((fileio + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen((fileio + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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