Why interactive task running idle?

Revision en1, by shanto_bangladesh, 2022-04-14 04:03:40

I tried to solve the following interactive problem: Problem link

~~~~~ bool testcase = 0 ; void solve() {
int hi = 1000000, lo = 1, mid; string s; while(lo+1<hi) { mid = (lo+hi)/2; cout << mid << "\n"; fflush(stdout); cin >> s; if(s[0]=='<') { hi = mid-1; } else { lo = mid; } } cout << hi << "\n"; fflush(stdout); cin >> s; if(s[0]=='>') cout << "! " << hi << "\n"; else cout << "! " << lo << "\n"; }

int main() { ios_base::sync_with_stdio(0); cin.tie(0); int t = 1; if(testcase == true) { cin >> t; } while(t--) { solve(); } } ~~~~~

When I ran the above piece of code in Visual Studio code terminal it didn't produce any output. Then I deleted the commented out lines in the main function. //ios_base::sync_with_stdio(0); //cin.tie(0);

Then it ran nicely producing desired output. Why it didn't work with those 2 lines of code?

Any insight will help a lot. Thanks for your patience.

Tags syntax, interactive-problem, c++

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en2 English shanto_bangladesh 2022-04-14 04:08:36 86 (published)
en1 English shanto_bangladesh 2022-04-14 04:03:40 1167 Initial revision (saved to drafts)