CSES - Datatähti 2026 loppu

Submission details
Task:	Bittijono
Sender:	sandyy
Submission time:	2026-01-17 16:52:47 +0200
Language:	C++ (C++17)
Status:	READY
Result:	16

Feedback
group	verdict	score
#1	WRONG ANSWER	0
#2	ACCEPTED	16
#3	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.00 s	1, 3	details
#2	ACCEPTED	0.00 s	1, 2, 3	details
#3	ACCEPTED	0.00 s	1, 3	details
#4	WRONG ANSWER	0.00 s	1, 3	details
#5	ACCEPTED	0.00 s	1, 3	details
#6	WRONG ANSWER	0.01 s	3	details
#7	ACCEPTED	0.01 s	2, 3	details
#8	WRONG ANSWER	0.01 s	3	details
#9	ACCEPTED	0.01 s	2, 3	details
#10	ACCEPTED	0.01 s	2, 3	details
#11	WRONG ANSWER	0.01 s	3	details
#12	ACCEPTED	0.02 s	2, 3	details
#13	WRONG ANSWER	0.01 s	3	details
#14	WRONG ANSWER	0.01 s	3	details
#15	WRONG ANSWER	0.01 s	3	details
#16	ACCEPTED	0.00 s	1, 2, 3	details
#17	ACCEPTED	0.00 s	1, 3	details
#18	ACCEPTED	0.00 s	1, 3	details
#19	ACCEPTED	0.01 s	3	details
#20	ACCEPTED	0.01 s	3	details

Code

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

#define ll long long
#define ar array


int n;
ll a, b;
string s[2];

ll cost(ll l) {
	return min(l*a, b);
}

int main() {
	cin >> n >> a >> b >> s[0] >> s[1];
	vector<bool> act(n, 0);
	if(s[0]==s[1]) {
		cout << 0 << "\n";
		return 0;
	}
	for(int i=0; i<n; i++) {
		if(s[0][i]!=s[1][i]) {
			act[i]=1;
		}
	}
	act.push_back(0);
	vector<ar<int, 2>> segs;
	int l=0;
	for(int i=1; i<=n; i++) {
		if(!act[i] && act[i-1]) {
			segs.push_back({l, i});
		}
		if(act[i] && !act[i-1]) {
			l=i;
		}
	}
	//for(ar<int, 2> se:segs) {
		//cout << se[0] << " " << se[1] << "\n";
	//}
	int m=segs.size();
	vector<ll> dp(m);
	dp[0]=cost(segs[0][1]-segs[0][0]);
	for(int i=1; i<m; i++) {
		dp[i]=min(dp[i-1]+cost(segs[i][1]-segs[i][0]), dp[i-1]+cost(segs[i][0]-segs[i-1][1]));
	}
	cout << dp.back();
}

Test details

Test 1 (public)

Group: 1, 3

Verdict: ACCEPTED

input
`8 3 5 10110001 01101000` view save

correct output
`11` view save

user output
`11` view save

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10 644 644 0111000100 0000010111` view save

correct output
`1932` view save

user output
`1932` view save

Test 3

Group: 1, 3

Verdict: ACCEPTED

input
`10 493 986 0001110000 0001100001` view save

correct output
`986` view save

user output
`986` view save

Test 4

Group: 1, 3

Verdict: WRONG ANSWER

input
`10 240 720 1011001110 1000000001` view save

correct output
`1200` view save

user output
`960` view save

Feedback: Incorrect character on line 1 col 1: expected "1200", got "960"

Test 5

Group: 1, 3

Verdict: ACCEPTED

input
`10 3 7 1110111111 0010010101` view save

correct output
`15` view save

user output
`15` view save

Test 6

Group: 3

Verdict: WRONG ANSWER

input
`100000 1 1000000000 001100110010101001010111000110...` view save

correct output
`50252` view save

user output
`33389` view save

Feedback: Incorrect character on line 1 col 1: expected "50252", got "33389"

Test 7

Group: 2, 3

Verdict: ACCEPTED

input
`100000 1000000000 1 110010000110110100110110101011...` view save

correct output
`25055` view save

user output
`25055` view save

Test 8

Group: 3

Verdict: WRONG ANSWER

input
`100000 1000 1000000000 001001101010100000011110000101...` view save

correct output
`50001000` view save

user output
`33371000` view save

Feedback: Incorrect character on line 1 col 1: expected "50001000", got "33371000"

Test 9

Group: 2, 3

Verdict: ACCEPTED

input
`100000 1000000000 1000 101010110001010011011011101110...` view save

correct output
`24939000` view save

user output
`24939000` view save

Test 10

Group: 2, 3

Verdict: ACCEPTED

input
`100000 1000000000 1000000000 001000000001000000000010110111...` view save

correct output
`25023000000000` view save

user output
`25023000000000` view save

Test 11

Group: 3

Verdict: WRONG ANSWER

input
`100000 123456789 987654321 100010110100011000001111001110...` view save

correct output
`5475678967593` view save

user output
`4099135765176` view save

Feedback: Incorrect character on line 1 col 1: expected "5475678967593", got "4099135765176"

Test 12

Group: 2, 3

Verdict: ACCEPTED

input
`100000 987654321 123456789 000100110000010110111101111101...` view save

correct output
`3071481453531` view save

user output
`3071481453531` view save

Test 13

Group: 3

Verdict: WRONG ANSWER

input
`100000 1000000 1000000000 001100110010100011000111101100...` view save

correct output
`49916000000` view save

user output
`33374000000` view save

Feedback: Incorrect character on line 1 col 1: expected "49916000000", got "33374000000"

Test 14

Group: 3

Verdict: WRONG ANSWER

input
`100000 10000000 1000000000 110111101101111110100101011000...` view save

correct output
`494930000000` view save

user output
`333840000000` view save

Feedback: Incorrect character on line 1 col 1: expected "494930000000", got "333840000000"

Test 15

Group: 3

Verdict: WRONG ANSWER

input
`100000 100000000 1000000000 111110000010100011011100110010...` view save

correct output
`4547300000000` view save

user output
`3332500000000` view save

Feedback: Incorrect character on line 1 col 1: expected "4547300000000", got "3332500000000"

Test 16

Group: 1, 2, 3

Verdict: ACCEPTED

input
`1 1 1 1 1` view save

correct output
`0` view save

user output
`0` view save

Test 17

Group: 1, 3

Verdict: ACCEPTED

input
`10 600 800 0000000000 1110111111` view save

correct output
`1400` view save

user output
`1400` view save

Test 18

Group: 1, 3

Verdict: ACCEPTED

input
`10 300 599 1101001010 0011010110` view save

correct output
`1198` view save

user output
`1198` view save

Test 19

Group: 3

Verdict: ACCEPTED

input
`100000 300000000 500000000 010011101001001010010101101101...` view save

correct output
`10000000000000` view save

user output
`10000000000000` view save

Test 20

Group: 3

Verdict: ACCEPTED

input
`100000 60000 1000000000 110110111011010100001000011011...` view save

correct output
`3000000000` view save

user output
`3000000000` view save

Datatähti 2026 loppu

Bittijono

Code

Test details

Test 1 (public)

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Tasks

Submissions (sandyy)