CSES - Datatähti 2018 alku - Results
Submission details
Task:Kyselyt
Sender:Shrike
Submission time:2017-10-03 09:28:44 +0300
Language:C++
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
#30
Test results
testverdicttimegroup
#10.19 s1details
#20.19 s2details
#30.18 s3details

Code

#include <iostream>
#include <sstream>
#include <string>
#include <cmath>
#include <algorithm>

using namespace std;
typedef long long ll;

ll
decade(ll n)
{
	ll sum; 

	sum = 0;
	for (int i = 1; i < 1000000; i++) {
		if (sum + i*9*pow(10.0, i-1) > n)
			return i;
		else
			sum += i*9*pow(10.0, i-1);
	}
	return 0;
}

ll
sums(ll decade)
{
	ll sum;

	sum = 0;
	for (int i = 1; i < decade; i++) 
		sum += i*9*pow(10.0, i-1);
	return sum;
}

int
main(int argc, char **argv)
{
	int q;
	cin >> q;
	ll qs[q];
	for (int i = 0; i < q; i++) {
		cin >> qs[i];
	}
	for (int i = 0; i < q; i++) {
		ll inth, nth, dec, s, sm;
		
		dec = decade(qs[i]);
		s = sums(dec);
		sm = qs[i] - s;
		nth = (ll)ceil((double)sm/(double)dec);
		inth = nth % dec;
		stringstream ss;
		ss << nth;
		string str = ss.str();
		reverse(str.begin(), str.end());
		cout << str.at(str.length() - inth-1) << endl;
	}
	return 0;
}

Test details

Test 1

Group: 1

Verdict:

input
1000
582
214
723
273
...

correct output
0
1
7
7
6
...

user output
1
9
7
8
7
...

Error:
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string...

Test 2

Group: 2

Verdict:

input
1000
615664
916441
627600
279508
...

correct output
1
2
3
2
2
...

user output
0
5
3
4
4
...

Error:
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string...

Test 3

Group: 3

Verdict:

input
1000
672274832941907421
260504693279721732
646999966092970935
100853063389774434
...

correct output
7
2
2
0
9
...

user output
1
8
2
2
8
...
Truncated

Error:
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string...