This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#define wiwihorz
#include <bits/stdc++.h>
#define rep(i, a, b) for(int i = a; i <= b; i ++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(x) x.begin(), x.end()
#define int long long int
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())
#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)
using namespace std;
#ifdef wiwihorz
#define print(a...)cerr<<"Line "<<__LINE__<<":",kout("["+string(#a)+"] = ", a)
void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
void kout(){cerr<< endl;}
template<class T1,class ... T2>void kout(T1 a,T2 ... e){cerr<<a<<" ",kout(e...);}
#else
#define print(...) 0
#define vprint(...) 0
#endif
signed main() {
int n, q;
cin >> n >> q;
vector<int> a(n + 1, 0);
auto query = [&](int L, int R) {
q--;
if(q < 0) while(1);
cout << "? " << L << " " << R << "\n";
cout.flush();
int x; cin >> x;
return x;
};
auto report = [&]() {
cout << "! ";
rep(i, 1, n) cout << (a[i] ? ")" : "(");
cout << "\n";
cout.flush();
};
a[n] = 1;
rep(i, 2, n - 1) {
int yes = 0;
for(int j = 1; i - j >= 1; j += 2) {
int x = query(i - j, i);
if(x) yes = 1;
}
a[i] = yes;
}
report();
return 0;
}
Compilation message (stderr)
zagrade.cpp:17:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
17 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
| ^~~~
zagrade.cpp:17:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
17 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L)==R], ++L;}
| ^~~~
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