Submission #484139

#	Time	Username	Problem	Language	Result	Execution time	Memory
484139		dxz05	Carnival (CEOI14_carnival)	C++14	0 / 100	1 ms	328 KiB

carnival

#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

#define MP make_pair

typedef long long ll;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.000001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e6 + 3e2;
const int M = 222;

int p[N];

int find(int x){
    return (x == p[x] ? x : p[x] = find(p[x]));
}

void unite(int x, int y){
    x = find(x);
    y = find(y);
    if (x == y) return;
    if (rng() & 1) swap(x, y);
    p[x] = y;
}

vector<int> mv(int l, int r){
    vector<int> res;
    while (l <= r) res.push_back(l++);
    return res;
}

int sz(vector<int> v){
    set<int> s;
    for (int i : v) s.insert(find(i));
    return s.size();
}

bool local = false;
int secret[N];

int MaxQ = 0;
int queries = 0;
int ask(vector<int> v){
    queries++;
    MaxQ = max(MaxQ, queries);

    if (local){
        set<int> s;
        for (int i : v) s.insert(secret[i]);
        return s.size();
    }

    cout << v.size() << ' ';
    for (int i : v) cout << i << ' ';
    cout << endl;

    int res;
    cin >> res;
    return res;
}

int rand(int l, int r){
    return l + rng() % (r - l + 1);
}

int answer[N];
void solve(int TC) {
    int n;
//    cin >> n;
    queries = 0;

//    local = true;
    if (local){
        n = rand(1, 150);
        for (int i = 1; i <= n; i++){
//            cin >> secret[i];
            secret[i] = rand(1, n);
        }
    } else {
        cin >> n;
    }

    iota(p + 1, p + n + 1, 1);

    vector<bool> used(n + 1, false);
    for (int i = 1; i < n; i++){
        while (true) {
            int l = i + 1, r = n;
            int ind = i;
            while (l <= r) {
                int m = (l + r) >> 1;
                if (ask(mv(i, m)) == sz(mv(i, m))) {
                    ind = m;
                    l = m + 1;
                } else r = m - 1;
            }

            if (ind == n) break;
            if (used[ind]) continue;
            used[ind] = true;

            l = i, r = ind;
            ind++;
            int ind2 = i;
            while (l <= r) {
                int m = (l + r) >> 1;
                if (ask(mv(m, ind)) < sz(mv(m, ind))) {
                    ind2 = m;
                    l = m + 1;
                } else r = m - 1;
            }

            unite(ind2, ind);
//        debug(ind2, ind);
        }
    }

    map<int, int> mp;
    for (int i = 1; i <= n; i++){
        int x = find(i);
        if (mp.find(x) == mp.end()) mp[x] = mp.size() + 1;
    }

    for (int i = 1; i <= n; i++) answer[i] = mp[find(i)];

    if (mp.size() != ask(mv(1, n))){
        for (int i = 1; i <= n; i++) cout << secret[i] << ' '; cout << endl;
        for (int i = 1; i <= n; i++) cout << answer[i] << ' '; cout << endl;
        assert(false);
    }

    if (!local) {
        cout << 0 << ' ';
        for (int i = 1; i <= n; i++) {
            cout << answer[i] << ' ';
        }
        cout << endl;
    }

//    debug(queries);

    if (local){
        for (int i = 1; i <= n; i++){
            for (int j = 1; j <= n; j++){
                bool b1 = answer[i] == answer[j];
                bool b2 = secret[i] == secret[j];
                assert(b1 == b2);
            }
        }
    }

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

#ifdef dddxxz
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
#endif

    int TC = 1;
    cin >> TC;

    for (int test = 1; test <= TC; test++) {
        //debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

    debug(MaxQ);

    cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;

    return 0;
}

Compilation message (stderr)

carnival.cpp: In function 'void solve(int)':
carnival.cpp:157:19: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  157 |     if (mp.size() != ask(mv(1, n))){
      |         ~~~~~~~~~~^~~~~~~~~~~~~~~~
carnival.cpp:158:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  158 |         for (int i = 1; i <= n; i++) cout << secret[i] << ' '; cout << endl;
      |         ^~~
carnival.cpp:158:64: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  158 |         for (int i = 1; i <= n; i++) cout << secret[i] << ' '; cout << endl;
      |                                                                ^~~~
carnival.cpp:159:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  159 |         for (int i = 1; i <= n; i++) cout << answer[i] << ' '; cout << endl;
      |         ^~~
carnival.cpp:159:64: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  159 |         for (int i = 1; i <= n; i++) cout << answer[i] << ' '; cout << endl;
      |                                                                ^~~~
carnival.cpp: In function 'int main()':
carnival.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
carnival.cpp:203:5: note: in expansion of macro 'debug'
  203 |     debug(MaxQ);
      |     ^~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20