CSES - Datatähti 2023 loppu - Results
Submission details
Task:Merkkijonot
Sender:DualRed
Submission time:2023-01-21 16:47:32 +0200
Language:C++ (C++17)
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED55
#3ACCEPTED30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2, 3details
#2ACCEPTED0.01 s1, 2, 3details
#3ACCEPTED0.01 s1, 2, 3details
#4ACCEPTED0.00 s1, 2, 3details
#5ACCEPTED0.01 s2, 3details
#6ACCEPTED0.01 s2, 3details
#7ACCEPTED0.01 s2, 3details
#8ACCEPTED0.06 s2, 3details
#9ACCEPTED0.01 s3details
#10ACCEPTED0.03 s3details
#11ACCEPTED0.06 s3details
#12ACCEPTED0.26 s3details
#13ACCEPTED0.01 s3details
#14ACCEPTED0.00 s3details
#15ACCEPTED0.06 s2, 3details
#16ACCEPTED0.26 s3details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:18:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         for(int k = 0; k < s.size(); k++){
      |                        ~~^~~~~~~~~~
input/code.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i = 1; i <= v.size(); i++){
      |                    ~~^~~~~~~~~~~

Code

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll MOD = 1000000007;
ll dp[501][251][251];
int main() {
int n; cin >> n;
vector<pair<int, int>> v;
int aTotal = 0; int bTotal = 0;
for(int i = 0; i < n; i++){
string s; cin >> s;
int a = 0; int b = 0;
for(int k = 0; k < s.size(); k++){
if(s[k] == 'a'){
a++;
aTotal++;
}
else{
b++;
bTotal++;
}
}
v.push_back(make_pair(a, b));
}
if(aTotal % 2 != 0 || bTotal % 2 != 0){
cout << 0;
return 0;
}
dp[0][0][0] = 1;
for(int i = 1; i <= v.size(); i++){
for(int a = 0; a <= 251; a++){
for(int b = 0; b <= 251; b++){
if(a-v[i-1].first < 0 || b-v[i-1].second < 0){
dp[i][a][b] = dp[i-1][a][b];
}
else{
dp[i][a][b] = (dp[i-1][a][b] + dp[i-1][a-v[i-1].first][b-v[i-1].second]) % MOD;
}
}
}
}
ll ans = dp[v.size()][aTotal / 2][bTotal / 2];
cout << ans << "\n";
/*
v = 1, 1, 1, 1
(0, 0) = 1
(1, 1) = 1
(1, 0) = 1
(2, 1) = 2
(3, 1) = 3
(4, 1) = 3+
*/
}
/*
100
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*/

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
4
b
bbb
baabaabaa
aab

correct output
0

user output
0

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
8
b
bb
baa
a
...

correct output
12

user output
12

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
16
a
a
a
b
...

correct output
5040

user output
5040

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
16
b
b
a
a
...

correct output
0

user output
0

Test 5

Group: 2, 3

Verdict: ACCEPTED

input
5
bab
bbaaabbabbbaababbbabbabaaabaaa...

correct output
0

user output
0

Test 6

Group: 2, 3

Verdict: ACCEPTED

input
10
baabbbababbbabbaaaabab
aabaaabbbab
aaaabbabab
aab
...

correct output
2

user output
2

Test 7

Group: 2, 3

Verdict: ACCEPTED

input
20
aaaab
baaab
babb
b
...

correct output
4332

user output
4332

Test 8

Group: 2, 3

Verdict: ACCEPTED

input
100
a
b
a
b
...

correct output
433105324

user output
433105324

Test 9

Group: 3

Verdict: ACCEPTED

input
10
aaaabbabbaabbaaaabbbbabaaaabab...

correct output
0

user output
0

Test 10

Group: 3

Verdict: ACCEPTED

input
50
aaba
aaa
abbbbaaba
ababbabbabab
...

correct output
636733956

user output
636733956

Test 11

Group: 3

Verdict: ACCEPTED

input
100
ba
bbbaba
bbba
bb
...

correct output
264657218

user output
264657218

Test 12

Group: 3

Verdict: ACCEPTED

input
500
a
b
b
b
...

correct output
394045503

user output
394045503

Test 13

Group: 3

Verdict: ACCEPTED

input
2
bbbababaaaabbbaaaaaaabbabbbaab...

correct output
2

user output
2

Test 14

Group: 3

Verdict: ACCEPTED

input
1
bbbaaaabaabbbababbbbbbbbabbbaa...

correct output
0

user output
0

Test 15

Group: 2, 3

Verdict: ACCEPTED

input
100
a
a
a
a
...

correct output
538992043

user output
538992043

Test 16

Group: 3

Verdict: ACCEPTED

input
500
a
a
a
a
...

correct output
515561345

user output
515561345