제출 #381473

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
381473		kartel	Paint (COI20_paint)	C++14	0 / 100	1 ms	364 KiB

paint

#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
*/

컴파일 시 표준 에러 (stderr) 메시지

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

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 31
• Subtask 4: 0 / 52