oj.uz

Submission #381474

# Submission time Handle Problem Language Result Execution time Memory
381474 2021-03-25T08:24:26 Z kartel Zagrade (COI20_zagrade) C++14
0 / 100
 1 ms 364 KB 
#include <bits/stdc++.h>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
//#include <time.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
#define F first
#define S second
#define pb push_back
#define M ll(1e9 + 7)
//#define M ll(998244353)
#define sz(x) (int)x.size()
#define re return
#define oo ll(1e18)
#define el '\n'
#define pii pair <int, int>
#define all(x) (x).begin(), (x).end()
#define arr_all(x, n) (x + 1), (x + 1 + n)
#define vi vector<int>
#define eps (ld)1e-9
using namespace std;
typedef long long ll;
//using namespace __gnu_pbds;
//typedef tree <ll, null_type, less_equal <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
typedef double ld;
typedef unsigned long long ull;
typedef short int si;

bool get(int l, int r) {
    int x;
    cout << "? " << l << " " << r << endl;
    cin >> x;

    return x;
}

int main()
{
//    mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());;
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//	in("toys.in");
//	out("toys.out");
//    in("input.txt");
//    out("output.txt");
//    cerr.precision(9); cerr << fixed;

//    clock_t tStart = clock();

    int n, q;
    cin >> n >> q;
    int last = 1;

    string ans = "";

    for (int i = 1; i <= n; i++) {
        ans += "X";
    }

    vector <int> op;

    op.pb(1);

    for (int i = 2; i <= n; i++) {
        if (!sz(op)) {
            op.pb(i);
            ans += "(";
            continue;
        }

        bool is = get(op.back(), i);

        if (!is) {
            ans += "(";
            op.pb(i);
        }
        else {
            ans += ")";
            op.pop_back();
        }
    }

    int ccl = n / 2;

    for (int i = 0; i < n; i++) {
        if (ans[i] == 'X') {
            if (!ccl) {
                ans[i] = '(';
            }
            else {
                ans[i] = ')';
                ccl--;
            }
        }
        else {
            if (ans[i] == ')') {
                ccl--;
            }
        }
    }

    cout << "! " << ans << endl;
}


/*

7
4 6 7 2 3 1 5
*/

Compilation message

zagrade.cpp: In function 'int main()':
zagrade.cpp:54:9: warning: unused variable 'last' [-Wunused-variable]
   54 |     int last = 1;
      |         ^~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Answer length should be 2, but it is 3
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Answer length should be 2, but it is 3
2 Halted 0 ms 0 KB -

Subtask #3
0 / 57.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Answer length should be 4, but it is 7
2 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Answer length should be 4, but it is 7
2 Halted 0 ms 0 KB -