Submission #1355463

#	Time	Username	Problem	Language	Result	Execution time	Memory
1355463		nanaseyuzuki	Carnival (CEOI14_carnival)	C++20	0 / 100	2 ms	344 KiB

carnival

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define pii pair<int, int>
#define all(a) a.begin(), a.end()
using namespace std;

#ifdef LOCAL
#include "C:\Users\Dell\Downloads\template\template\icpc-notebook\Utilities\debug.h"
#else
#define debug(...) 42
#endif

const int mn = 5e5 + 5, mod = 1e9 + 7, inf = 2e9;

int n, cnt = 0, res[mn];

int bit[mn];

void add(int u, int val) {
	while(u <= n) {
		bit[u] += val;
		u += (u & -u);
	} 
}

int get(int u) {
	int r = 0;
	while(u) {
		r += bit[u];
		u -= (u & -u);
	}
	return r;
}

int get(int l, int r) {
	return get(r) - get(l - 1);
}

int ask(vector <int> candidate) {
	cout << (int) candidate.size() << ' ';
	for(auto u : candidate) cout << u << ' ';
	cout << endl;
	int ans; cin >> ans;
	return ans;
}

void solve() {
 	cin >> n;
 	for(int i = 1; i <= n; i++) {
 		int l = 1, r = i - 1, ans = 1;
 		while(l <= r) {
 			int mid = (l + r) >> 1;
 			vector <int> candidate;
 			for(int j = mid; j <= i; j++) candidate.push_back(j);
 			int val = ask(candidate);

 			if(val == get(mid, i - 1) + 1) {
 				ans = mid;
 				r = mid - 1;
 			}
 			else l = mid + 1;
 		}
 		if(ans == 1) {
 			res[i] = ++ cnt;
 			add(i, 1);
 		}
 		else {
 			add(ans - 1, -1);
 			res[i] = res[ans - 1];
 			add(i, 1);
 		}
 	}
 	cout << 0 << ' ';
 	for(int i = 1; i <= n; i++) cout << res[i] << ' ';
 	return;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    #define task "Kawabata"
    if (fopen(task".INP", "r")) {
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }
    int t = 1;
    // cin >> t;
    while (t--) solve();
    return 0;
}
// Don't wanna lose anymore T_T
// Never let me go - Kazuo Ishiguro

Compilation message (stderr)

carnival.cpp: In function 'int main()':
carnival.cpp:85:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
carnival.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen(task".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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