Submission #1011456

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011456		vannnnnnnn	Zagrade (COI20_zagrade)	C++14	100 / 100	557 ms	1520 KiB

zagrade

#include<bits/stdc++.h>
using namespace std;

int main()
{
	int n, q;
	scanf("%d %d", &n, &q);
	char s[n+5];
	vector<int>v;
	s[1]='(';
	for(int i=1; i<=n; i++)
	{
		if(v.empty())
		{
			s[i]='(';
			v.push_back(i);
			continue;
		}
		printf("? %d %d\n", v.back(), i);
		fflush(stdout);
		int ans;
		scanf("%d", &ans);
		if(ans==1)
		{
			s[v.back()]='(';
			s[i]=')';
			v.pop_back();
		}
		else
		{
			v.push_back(i);
		}
	}
	for(int i=0; i<v.size()/2; i++)
	{
		s[v[i]]=')';
	}
	for(int i=v.size()/2; i<v.size(); i++)
	{
		s[v[i]]='(';
	}
	printf("! ");
	for(int i=1; i<=n; i++)
	{
		printf("%c", s[i]);
	}
	printf("\n");
	fflush(stdout);
}

Compilation message (stderr)

zagrade.cpp: In function 'int main()':
zagrade.cpp:34:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |  for(int i=0; i<v.size()/2; i++)
      |               ~^~~~~~~~~~~
zagrade.cpp:38:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |  for(int i=v.size()/2; i<v.size(); i++)
      |                        ~^~~~~~~~~
zagrade.cpp:7:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |  scanf("%d %d", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~
zagrade.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |   scanf("%d", &ans);
      |   ~~~~~^~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 7 / 7
• Subtask 3: 57 / 57
• Subtask 4: 22 / 22