Submission #897902

#	Time	Username	Problem	Language	Result	Execution time	Memory
897902		whatthemomooofun1729	Carnival (CEOI14_carnival)	C++14	100 / 100	4 ms	708 KiB

carnival

#include <iostream>
#include <algorithm>
#include <utility>
#include <vector>
#include <stack>
#include <map>
#include <queue>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cstring>
#include <cmath>
#include <functional>
#include <cassert>
#include <iomanip>
#include <numeric>
#include <bitset>
#include <sstream>
#include <chrono>
#include <random>

#define ff first
#define ss second
#define ll long long
#define ld long double
#define PB push_back
#define MP make_pair
#define MT make_tuple
#define EB emplace_back
#define PoB pop_back
#define LOG log2
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define fch(t, v) for (auto t : v)
#define sz(x) int(x.size())
#define rsz resize
#define gp(x) vector<vector<x>>
#define btree vector<pii>
#define vc(x) vector<x>
#define vll vector<ll>
#define Max(a, b, c) max(max(a,b),c)
#define fMax(a, b, c, d) max(Max(a, b, c), dp)
#define Min(a, b, c) min(min(a,b),c)
#define Mid(a, b, c) max(min(a, b), min(max(a, b), c))
#define st(a) set<a>
#define gr(x) greater<x>
#define gi greater<int>
#define all(x) (x).begin(),(x).end()
#define tri(x) tuple<x,x,x>
#define pil pair<int, long>
#define ull unsigned long long
#define eps 1e-9
//#define debug(x) cout << '>' << #x << ':' << x << endl;

using namespace std;

void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
void println() {cerr << ">--------------------<" << endl;}
void printm(vector<vector<int>>& mat) {
    cerr << "matrix: " << endl;
    for (int i = 0; i<(int)mat.size(); i++) {for (int j = 0; j<(int)mat[0].size(); j++) {cerr << mat[i][j] << " ";} cerr << endl;}
}

#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;

// templates
template <class T> bool ckmin(T &a, const T &b) {return b<a ? a = b, 1 : 0;}
template <class T> bool ckmax(T &a, const T &b) {return b>a ? a = b, 1 : 0;}
mt19937_64 rng_ll(chrono::steady_clock::now().time_since_epoch().count());
int rng(int M) {return (int)(rng_ll()%M);}

constexpr int INF = (int)2e9;
constexpr int MOD = 998244353;
constexpr ll LL_INF = (ll)3e18;
constexpr int mod = (int)1e9 + 7;
constexpr ll inverse = 500000004LL; // inverse of 2 modulo 1e9 + 7

void setIO(const string& str) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (str.empty()) return;
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
}

int N;
vi parent, val;

int find_set(int v) {
    if (parent[v] == v) return v;
    return parent[v] = find_set(parent[v]);
}

void no_one_asked(vector<int>& v, int i) { // ask nontrivial
    cout << sz(v) + 1 << ' ';
    fch(x, v) cout << x << ' ';
    cout << i << endl;
}

int main() { // TIME YOURSELF !!!
    setIO("");
    cin >> N;
    vi v;
    parent.rsz(N+1), val.rsz(N+1, 0);
    iota(parent.begin() + 1, parent.end(), 1);
    for (int i = 1; i <= N; ++i) {
        no_one_asked(v, i);
        int M;
        cin >> M;
        if (M == sz(v) + 1) v.PB(i);
        else {
            int l = 0, r = sz(v) - 1, pos = INF;
            while (l <= r) {
                int mid = (l + r)/2;
                cout << mid+2 << ' ' << i << ' ';
                for (int j = 0; j <= mid; ++j) {
                    cout << v[j] << ' ';
                }
                cout << endl;
                cin >> M;
                if (M == mid + 1) {
                    r = mid - 1;
                    ckmin(pos, mid);
                } else l = mid + 1;
            }
            parent[i] = v[pos];
        }
    }
    int cnt = 1;
    cout << "0 ";
    for (int i = 1; i <= N; ++i) {
        int p = find_set(i);
        if (!val[p]) val[p] = cnt++;
        cout << val[p] << ' ';
    }
    return 0;
}

// CHECK LONG LONGS, binary search on ans?
// Do something, start simpler
// IBM motto: THINK

Compilation message (stderr)

carnival.cpp: In function 'void setIO(const string&)':
carnival.cpp:112:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  112 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
carnival.cpp:113:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  113 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20