#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
const ll mod=1e9+7;
const ll maxn=1e5+5;
const int INF=1e9+5;
#define ok ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define fi first
#define se second
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define endl '\n'
int bk, ttp, jwb, rem;
map<int, int> mp;
stack<int> st;
ll n, q;
int main() {
ok
cin >> n >> q;
if(q==(n*n)/4) {
rem=0;
for(int i=1; i<n; i++) {
for(int j=i+1; j<=n; j+=2) {
cout << "? " << i << " " << j << endl;
cout.flush();
cin >> jwb;
if(jwb==1) {
mp[i]=1;
mp[j]=2;
}
}
}
for(int i=1; i<=n; i++) {
if(!mp.count(i)) {
rem++;
}
}
rem/=2;
for(int i=1; i<=n; i++) {
if(rem && !mp.count(i)) {
mp[i]=2;
rem--;
} else if(!mp.count(i)) mp[i]=1;
}
cout << "! ";
for(int i=1; i<=n; i++) {
if(mp[i]==1) cout << '(';
else cout << ')';
}
cout << endl;
return 0;
}
for(int i=1; i<=n; i++) {
if(st.empty()) {
ans[i]='(';
st.push(i);
continue;
}
cout << "? " << st.top() << " " << i << endl;
cout.flush();
cin >> jwb;
if(jwb==1) {
ans[i]=')';
st.pop();
} else {
ans[i]='(';
st.push(i);
}
}
cout << "! ";
for(int i=1; i<=n; i++) {
cout << ans[i];
}
cout << endl;
return 0;
}
Compilation message
zagrade.cpp: In function 'int main()':
zagrade.cpp:60:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
60 | ans[i]='(';
| ^~~
| abs
zagrade.cpp:68:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
68 | ans[i]=')';
| ^~~
| abs
zagrade.cpp:71:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
71 | ans[i]='(';
| ^~~
| abs
zagrade.cpp:77:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
77 | cout << ans[i];
| ^~~
| abs
