oj.uz

Submission #669739

# Submission time Handle Problem Language Result Execution time Memory
669739 2022-12-07T07:51:24 Z mychecksedad Colors (BOI20_colors) C++17
0 / 100
 2 ms 208 KB 
/* Author : Mychecksdead */
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef long double ld;
#define MOD1 (1000000000+7)
#define MOD (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 1e6+100, M = 1e5+10, F = 2147483646, K = 20;


bool ask(int c){
	cout << "? " << c << endl;
	bool r; cin >> r;
	return r;
}
void result(int k){
	cout << "= " << k << endl;
	exit(0);
}

int n;
void solve(){
	cin >> n;
	vector<int> v;
	int l = 1, r = n;


	
	while(l <= r){
		v.pb(l);
		if(l != r)
			v.pb(r);
		if(l + 2 < r - 2)
			l+=2, r-=2;
		else
			l++, r--;
	}
	vector<bool> used(n+1);
	ask(v[0]);
	used[v[0]] = 1;
	for(int i = 1; i < v.size(); ++i){
		bool b = ask(v[i]);
		used[v[i]] = 1;
		if(b == 0){
			int d = abs(v[i] - v[i - 1]) + 1;


			if(i > 1 && abs(v[i - 1] - v[i - 2]) == d) result(d);
			
			if(d == n){
				result(d);
			}

			if(v[i] - d >= 1 && !used[v[i] - d]){
				b = ask(v[i] - d);
			}else{
				b = ask(v[i] + d);
			}
			if(b == 1){
				result(d);
			}else{
				result(d + 1);
			}
		}
	}
	result(1);
}




int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
    }
    return 0;
 
}

Compilation message

Colors.cpp: In function 'void solve()':
Colors.cpp:48:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for(int i = 1; i < v.size(); ++i){
      |                 ~~^~~~~~~~~~
Colors.cpp: In function 'int main()':
Colors.cpp:81:16: warning: unused variable 'aa' [-Wunused-variable]
   81 |     int T = 1, aa;
      |                ^~

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 2 ms 208 KB OK (5 queries)
3 Correct 2 ms 208 KB OK (7 queries)
4 Correct 1 ms 208 KB OK (14 queries)
5 Correct 1 ms 208 KB OK (9 queries)
6 Correct 1 ms 208 KB OK (15 queries)
7 Correct 1 ms 208 KB OK (11 queries)
8 Correct 1 ms 208 KB OK (6 queries)
9 Correct 1 ms 208 KB OK (7 queries)
10 Correct 1 ms 208 KB OK (7 queries)
11 Runtime error 1 ms 208 KB Execution killed with signal 13
12 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 2 ms 208 KB OK (5 queries)
3 Correct 2 ms 208 KB OK (7 queries)
4 Correct 1 ms 208 KB OK (14 queries)
5 Correct 1 ms 208 KB OK (9 queries)
6 Correct 1 ms 208 KB OK (15 queries)
7 Correct 1 ms 208 KB OK (11 queries)
8 Correct 1 ms 208 KB OK (6 queries)
9 Correct 1 ms 208 KB OK (7 queries)
10 Correct 1 ms 208 KB OK (7 queries)
11 Runtime error 1 ms 208 KB Execution killed with signal 13
12 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 2 ms 208 KB OK (5 queries)
3 Correct 2 ms 208 KB OK (7 queries)
4 Correct 1 ms 208 KB OK (14 queries)
5 Correct 1 ms 208 KB OK (9 queries)
6 Correct 1 ms 208 KB OK (15 queries)
7 Correct 1 ms 208 KB OK (11 queries)
8 Correct 1 ms 208 KB OK (6 queries)
9 Correct 1 ms 208 KB OK (7 queries)
10 Correct 1 ms 208 KB OK (7 queries)
11 Runtime error 1 ms 208 KB Execution killed with signal 13
12 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 2 ms 208 KB OK (5 queries)
3 Correct 2 ms 208 KB OK (7 queries)
4 Correct 1 ms 208 KB OK (14 queries)
5 Correct 1 ms 208 KB OK (9 queries)
6 Correct 1 ms 208 KB OK (15 queries)
7 Correct 1 ms 208 KB OK (11 queries)
8 Correct 1 ms 208 KB OK (6 queries)
9 Correct 1 ms 208 KB OK (7 queries)
10 Correct 1 ms 208 KB OK (7 queries)
11 Runtime error 1 ms 208 KB Execution killed with signal 13
12 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB OK (5 queries)
2 Correct 2 ms 208 KB OK (5 queries)
3 Correct 2 ms 208 KB OK (7 queries)
4 Correct 1 ms 208 KB OK (14 queries)
5 Correct 1 ms 208 KB OK (9 queries)
6 Correct 1 ms 208 KB OK (15 queries)
7 Correct 1 ms 208 KB OK (11 queries)
8 Correct 1 ms 208 KB OK (6 queries)
9 Correct 1 ms 208 KB OK (7 queries)
10 Correct 1 ms 208 KB OK (7 queries)
11 Runtime error 1 ms 208 KB Execution killed with signal 13
12 Halted 0 ms 0 KB -