Task: | Merkkijonot |
Sender: | vgtcross |
Submission time: | 2023-01-21 14:12:19 +0200 |
Language: | C++ (C++11) |
Status: | READY |
Result: | 100 |
group | verdict | score |
---|---|---|
#1 | ACCEPTED | 15 |
#2 | ACCEPTED | 55 |
#3 | ACCEPTED | 30 |
test | verdict | time | group | |
---|---|---|---|---|
#1 | ACCEPTED | 0.00 s | 1, 2, 3 | details |
#2 | ACCEPTED | 0.00 s | 1, 2, 3 | details |
#3 | ACCEPTED | 0.00 s | 1, 2, 3 | details |
#4 | ACCEPTED | 0.00 s | 1, 2, 3 | details |
#5 | ACCEPTED | 0.00 s | 2, 3 | details |
#6 | ACCEPTED | 0.00 s | 2, 3 | details |
#7 | ACCEPTED | 0.00 s | 2, 3 | details |
#8 | ACCEPTED | 0.00 s | 2, 3 | details |
#9 | ACCEPTED | 0.00 s | 3 | details |
#10 | ACCEPTED | 0.01 s | 3 | details |
#11 | ACCEPTED | 0.01 s | 3 | details |
#12 | ACCEPTED | 0.03 s | 3 | details |
#13 | ACCEPTED | 0.00 s | 3 | details |
#14 | ACCEPTED | 0.00 s | 3 | details |
#15 | ACCEPTED | 0.00 s | 2, 3 | details |
#16 | ACCEPTED | 0.00 s | 3 | details |
Code
#include <bits/stdc++.h>#define MODE 0#if MODE == 1#define debug(x) cout << #x << ": " << x << endl#define log(x) cout << x << endl#else#define debug(x)#define log(x)#endif#define M 1000000007using namespace std;using ll = long long;using pii = pair<int, int>;void solve() {int n;cin >> n;vector<pii> v(n, {0, 0});int acnt=0, bcnt=0;for (int i = 0; i < n; ++i) {string s;cin >> s;for (char c: s) {if (c == 'a') {++v[i].first;++acnt;} else {++v[i].second;++bcnt;}}}if ((acnt&1) || (bcnt&1)) {cout << "0\n";return;}int agoal = acnt>>1;int bgoal = bcnt>>1;ll dp[agoal+1][bgoal+1];ll next[agoal+1][bgoal+1];memset(dp, 0, sizeof(dp));memset(next, 0, sizeof(next));dp[0][0] = 1;int anow = 0;int bnow = 0;for (int i = 0; i < n; ++i) {for (int j = 0; j <= anow && j <= agoal; ++j) {for (int k = 0; k <= bnow && k <= bgoal; ++k) {next[j][k] = (next[j][k] + dp[j][k]) % M;if (j + v[i].first <= agoal && k + v[i].second <= bgoal) {next[j + v[i].first][k + v[i].second] = (next[j + v[i].first][k + v[i].second] + dp[j][k]) % M;}}}copy(next[0], next[agoal]+bgoal+1, dp[0]);memset(next, 0, sizeof(next));anow += v[i].first;bnow += v[i].second;}cout << dp[agoal][bgoal] << '\n';}int main() {ios_base::sync_with_stdio(false);cin.tie(nullptr);//freopen("input.txt", "r", stdin);solve();return 0;}
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 |