Submission #106171

#	Time	Username	Problem	Language	Result	Execution time	Memory
106171		sofhiasouza	Sequence (BOI14_sequence)	C++14	25 / 100	41 ms	512 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int k, a;
	string s;
	cin >> k;
	for(int i = 0 ; i < k ; i++) cin >> a;
	k--;
	stringstream ans;
	ans << k;
	ans >> s;
	if(k == 0 and a != 0) cout << a << endl;
	else if(a == 0)
	{
		long long int p = 0;
		for(int i = 1 ; i <= s.size() ; i++) p += (long long int)pow(10, s.size() - i);
		if(k == 0) cout << 10 << endl;
		else if(p >= k+1) cout << (long long int)pow(10, s.size()) << endl;
		else cout << (long long int)pow(10, s.size()+1) << endl;
	}
	else if(a == 9)
	{
		long long int p = 0, p2 = 0;
		p2 += (long long int)pow(10, s.size() - 1);
		for(int i = 2 ; i <= s.size() ; i++) p += (long long int)pow(10, s.size() - i);
		p2 += p;
		if(s.size() == 1) cout << 89 << endl;
		else if((long long int)p + (long long int)pow(10, s.size()-1) >= k+1) cout << (long long int)pow(10, s.size()-1)*9 - p << endl; 
		else cout << (long long int)pow(10, s.size())*9 - p2 << endl;
	}
	else cout << (long long int)pow(10, s.size())*a << endl;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 1 ; i <= s.size() ; i++) p += (long long int)pow(10, s.size() - i);
                   ~~^~~~~~~~~~~
sequence.cpp:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 2 ; i <= s.size() ; i++) p += (long long int)pow(10, s.size() - i);
                   ~~^~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 33
• Subtask 3: 25 / 25
• Subtask 4: 0 / 33