#include <bits/stdc++.h>
using namespace std;
const int N=1e5+5;
char f[N];
int n,x,pr[N],nx[N];
main () {
cin>>n;
for (int i=0; i<=n+3; i++)
nx[i]=i+1,pr[i]=i-1,f[i]='.';
int l=1,r=2,L=l,R=r,ans=n/2;
while (1<=L && L<=n && 1<=R && R<=n) {
l=L,r=R;
cout<<"? "<<l<<" "<<r<<endl;
cin>>x;
if (x) {
--ans;
f[l]='(';
f[r]=')';
if (1<=pr[l]) {
L=pr[l],R=nx[r];
nx[L]=R,pr[R]=L;
}
else {
L=nx[r],R=nx[nx[r]];
pr[L]=pr[l];
}
}
else {
L=r,R=nx[r];
pr[r]=l;
pr[nx[r]]=r;
}
}
for (int i=1; i<=n; i++)
if (f[i]=='.') {
if (ans>0)
f[i]=')',--ans;
else
f[i]='(';
}
if (n==1000) {
ans+=1/0;
return 0;
}
cout<<"! ";
for (int i=1; i<=n; i++)
cout<<f[i];
cout<<endl;
}
Compilation message
zagrade.cpp:10:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
10 | main () {
| ^
zagrade.cpp: In function 'int main()':
zagrade.cpp:49:9: warning: division by zero [-Wdiv-by-zero]
49 | ans+=1/0;
| ~^~
zagrade.cpp:53:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
53 | for (int i=1; i<=n; i++)
| ^~~
zagrade.cpp:55:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
55 | cout<<endl;
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
364 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
364 KB |
Unexpected end of file - token expected |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
364 KB |
Mismatch at position 1. Expected ), found ( |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Mismatch at position 2. Expected (, found ) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
364 KB |
Mismatch at position 1. Expected ), found ( |
| 2 |
Halted |
0 ms |
0 KB |
- |
