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Datatähti 2018 alku

Start:2017-10-02 00:00:00
End:2017-10-16 00:00:00
 

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CSES - Datatähti 2018 alku - Results
History
2017-10-02 20:32:25100
2017-10-02 20:23:4137
2017-10-02 20:21:5937
Task:Kyselyt
Sender:suola_makkara
Submission time:2017-10-02 20:32:25
Language:C++
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED12
#2ACCEPTED25
#3ACCEPTED63

Test results

testverdicttime (s)group
#1ACCEPTED0.05 / 1.001details
#2ACCEPTED0.04 / 1.002details
#3ACCEPTED0.05 / 1.003details

Code

#include <iostream>
#include <string>

using namespace std;

long pow(int a, int b)
{
	if (b == 0) return 1;
	long t = a;
	for (int i = 1; i < b; i++)
		t *= a;
	return t;
}

long nums(int n)
{
	return ((pow(10, n) - 1) - (pow(10, n - 1) - 1)) * n;
}

char at(long x)
{
	int i = 1;
	long num2 = 0;
	long num = nums(1);
	while (x - num > 0)
	{
		i++;
		num2 = num;
		num += nums(i);
	}
	x -= num2;
	long p = x - 1;
	x = p / i;
	x += pow(10, i - 1);
	string n = to_string(x);
	return n[p % i];
}

int main()
{
	int q;
	cin >> q;
	for (int i = 0; i < q; i++)
	{
		long x;
		cin >> x;
		cout << at(x) << '\n';
	}
	return 0;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
1000
582
214
723
273
480
280
237
204
134
210
565
640
784
508
846
532
465
952
205
...
view   save

correct output
0
1
7
7
6
1
5
4
7
6
2
2
2
2
8
2
1
3
1
8
...
view   save

user output
0
1
7
7
6
1
5
4
7
6
2
2
2
2
8
2
1
3
1
8
...
view   save

Test 2

Group: 2

Verdict: ACCEPTED

input
1000
615664
916441
627600
279508
126605
944125
25887
440405
352957
206746
951305
821686
716797
333476
430123
167570
619834
411383
459670
...
view   save

correct output
1
2
3
2
2
8
7
9
8
3
7
1
9
8
4
3
1
9
9
6
...
view   save

user output
1
2
3
2
2
8
7
9
8
3
7
1
9
8
4
3
1
9
9
6
...
view   save

Test 3

Group: 3

Verdict: ACCEPTED

input
1000
672274832941907421
260504693279721732
646999966092970935
100853063389774434
469646937576313460
292789544562527987
202678876957048242
921044261294332160
293497307441838185
889420403130803486
887773296767104352
272588988734184089
900854413164191389
306838570888252671
321818592757748092
632312861733842235
590425060048634753
921705179835679834
711775852688052272
...
view   save

correct output
7
2
2
0
9
7
7
2
0
4
0
3
0
5
9
9
3
1
2
7
...
view   save

user output
7
2
2
0
9
7
7
2
0
4
0
3
0
5
9
9
3
1
2
7
...
view   save