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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#409061 | #8287. Caught in the Middle | ucup-team3215# | WA | 1ms | 3968kb | C++20 | 1.4kb | 2024-05-11 16:59:47 | 2024-05-11 16:59:48 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
using pii = array<int, 2>;
using vi = vector<int>;
const int N = 12;
using bs = bitset<N>;
vector<vi> dp(N + 1, vi(1 << N, -1));
int sol(int m, int n) {
if (dp[n][m] != -1) {
return dp[n][m];
}
pii cnt = {};
for (int i = 0; i < n; ++i) {
if (m & (1 << i)) {
// cout << bs(m) << ' ' << bs(m >> (i + 1)) << endl;
int ret = sol(m >> (i + 1), n - 1 - i);
++cnt[ret];
} else {
// cout << bs(m) << ' ' << bs(m & ((1 << (i + 1)) - 1)) << endl;
int ret = sol(m & ((1 << (i + 1)) - 1), i);
++cnt[ret];
}
}
return dp[n][m] = (cnt[0] > 0);
}
int main() {
dp[0][0] = 0;
for (int i = 1; i < (1 << N); ++i) {
if (sol(i, N) == 0) {
// cout << bs(i) << endl;
bool cond = (i & (1 << (N - 1))) == 0 && (i & 1) && bs(i).count() * 2 == N;
assert(cond);
}
}
ios::sync_with_stdio(false);
cin.tie(0);
int t;
cin >> t;
while (t--) {
int n;
cin >> n;
string s;
cin >> s;
pii cnt = {};
for (char c : s) {
++cnt[c == 'L' ? 0 : 1];
}
bool cond = s[n - 1] == 'L' && s[0] == 'R' && cnt[0] * 2 == n;
cout << (cond ? "Bob" : "Alice") << '\n';
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3688kb
input:
20 10 RLRRRRLLRR 10 LRLLLLRRLR 6 RLRLRL 10 LLRLRRRRLR 6 LRRLLL 3 RLR 5 LLRRR 6 RRRRRL 9 LRRRLRRLR 1 R 10 RRRLLRRLLL 6 LRLLLR 9 LLRLRLRLR 7 RRRRLRR 2 LL 10 RRRLLRRLRR 2 RL 7 RRLRRLR 3 LLR 10 LLRLRRRLLR
output:
Alice Alice Bob Alice Alice Alice Alice Alice Alice Alice Bob Alice Alice Alice Alice Alice Bob Alice Alice Alice
result:
ok 20 lines
Test #2:
score: 0
Accepted
time: 1ms
memory: 3788kb
input:
20 7 LRLLRRR 8 LRLRLRRR 3 RLL 10 RLRLRLRLRL 10 RLRLRLRLRL 6 RLLLRL 10 RLRLRLRLLL 5 RLRRR 2 LL 10 RRRRLRLRLL 7 LLRRLLR 3 LRR 10 RRRRRLLLLL 10 RLRRRLRLRR 2 LR 6 RRLLLL 4 RRLR 10 LRLRLLRLRR 4 LRLL 10 RRLLRRRLLL
output:
Alice Alice Alice Bob Bob Alice Alice Alice Alice Alice Alice Alice Bob Alice Alice Alice Alice Alice Alice Bob
result:
ok 20 lines
Test #3:
score: 0
Accepted
time: 1ms
memory: 3964kb
input:
20 8 LLLRRRRR 10 LRRRLRLLRL 10 RLRLRLRLRL 6 RRLRRL 10 RLLLLRLLRR 2 RR 8 LLRRRLRL 10 LRLRLRRRRR 4 RRLL 5 LLRLL 10 RLRRLLRLRL 1 R 10 RLLRRLRLLL 10 LLLRLLRLRR 10 LRRLRLLRRR 3 RRL 10 RRRLRLLRLL 1 L 3 RRL 5 LRRLL
output:
Alice Alice Bob Alice Alice Alice Alice Alice Bob Alice Bob Alice Alice Alice Alice Alice Bob Alice Alice Alice
result:
ok 20 lines
Test #4:
score: 0
Accepted
time: 1ms
memory: 3944kb
input:
20 6 RLRLLL 2 RL 10 LRRRLRLRLR 7 LLLRRRR 3 RRR 3 LRL 10 LRLRRLLLLR 10 RRLLLLRLLR 5 LLLLL 10 RLRLLRLRLR 8 RRLRLRLL 9 RRLRLRRLR 8 RLRLRLRL 1 R 10 RRLRLRRRLL 3 LLL 1 L 6 LLLRLL 10 RLRLRLRRLL 3 LRL
output:
Alice Bob Alice Alice Alice Alice Alice Alice Alice Alice Bob Alice Bob Alice Alice Alice Alice Alice Bob Alice
result:
ok 20 lines
Test #5:
score: 0
Accepted
time: 1ms
memory: 3792kb
input:
20 4 RLRL 10 RRRLLRLLRL 10 RLRRLRLRLL 4 RLRL 4 RLRL 2 LR 2 RL 1 R 6 RRLRLL 10 RRRLRRLLLL 1 L 10 RLLRRRLLLL 2 RL 8 RRRRLLLL 10 RRLRRRLLLL 10 RLRRLRLRLL 10 RRLLRRLRLL 1 L 4 RLRL 4 RLRL
output:
Bob Bob Bob Bob Bob Alice Bob Alice Bob Bob Alice Alice Bob Bob Bob Bob Bob Alice Bob Bob
result:
ok 20 lines
Test #6:
score: 0
Accepted
time: 1ms
memory: 3888kb
input:
20 10 RRLLRLRRLL 4 RLRL 10 RRLLRLRLRL 1 L 2 LR 3 LLR 10 RLRRLRRLLL 10 RRLLRRLLRL 3 RRL 10 RRLRLLRRLL 1 L 10 RRRLLRLLRL 8 RLRLRRLL 10 RRLRLRLRLL 8 RRLLRRLL 3 RLL 4 RLRL 2 LR 10 RRRLLLRLRL 10 RRLRRRLLLL
output:
Bob Bob Bob Alice Alice Alice Bob Bob Alice Bob Alice Bob Bob Bob Bob Alice Bob Alice Bob Bob
result:
ok 20 lines
Test #7:
score: 0
Accepted
time: 1ms
memory: 3776kb
input:
20 1 L 4 RRLL 10 RLRRRRLLLL 10 RRLLRRRLLL 4 RLRL 3 LRR 3 RRR 1 R 4 RRLL 10 RLRLRLRLRL 10 RRRLLRRLLL 8 RRRLLRLL 10 RLRLRRLRLL 8 RRLLRLRL 4 RRLL 10 RRLLRRRLLL 1 L 8 RLRRLRLL 8 RRLLRRLL 6 RLRRLL
output:
Alice Bob Bob Bob Bob Alice Alice Alice Bob Bob Bob Bob Bob Bob Bob Bob Alice Bob Bob Bob
result:
ok 20 lines
Test #8:
score: 0
Accepted
time: 1ms
memory: 3968kb
input:
20 8 RRRLLLRL 4 RLRL 4 RLRL 10 RRRLLRLRLL 10 RLRLRLRLRL 4 RRLL 8 RRRRLLLL 6 RRLRLL 8 RRRLRLLL 10 RRRRLRLLLL 6 RLRRLL 6 RRLRLL 10 RRRLRRLLLL 8 RLRRLLRL 6 RRRLLL 4 RLRL 4 RLRL 6 RRLLRL 4 RLRL 1 L
output:
Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Alice
result:
ok 20 lines
Test #9:
score: 0
Accepted
time: 1ms
memory: 3692kb
input:
20 10 RRRRRLLLLL 1 L 8 RRRRLLLL 3 LRR 4 RLLL 10 RRLRRLLRLL 10 RRRRLLLRLL 1 R 2 LL 6 RRRLLL 3 RRR 10 RRRRRLLLLL 1 R 10 RRRLRRLLLL 8 RRRRLLLL 4 RRLL 10 RRRRRLLLLL 4 RRLL 8 RRRRLLLL 10 RRRRRLLLLL
output:
Bob Alice Bob Alice Alice Bob Bob Alice Alice Bob Alice Bob Alice Bob Bob Bob Bob Bob Bob Bob
result:
ok 20 lines
Test #10:
score: 0
Accepted
time: 1ms
memory: 3724kb
input:
20 6 RLRLRL 2 RL 10 RLRLRLRLRL 10 RLRLRLRLRL 4 RLRL 8 RLRLRLRL 1 L 8 RLLRLLRR 6 RRLRLL 8 RLRRLLRL 10 RLRLRRLLRL 10 RLRLRLRLRL 10 RLRLRLRRLL 6 RLRLRL 8 RLRLRRLL 6 RLRLRL 6 RLRLRL 8 RLRLRLRL 10 RRRLRLLRLL 2 RL
output:
Bob Bob Bob Bob Bob Bob Alice Alice Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob Bob
result:
ok 20 lines
Test #11:
score: 0
Accepted
time: 1ms
memory: 3792kb
input:
20 3 LRR 1 R 8 RRLLRLRL 10 LLLRRRLRLR 4 RLRL 1 L 10 RRLLRLRLRL 4 RLRL 3 LLL 10 RRLRLRLRLL 6 RRLLRL 2 LL 4 RLRL 10 RLRLRLRLRL 8 RLRLRLRL 6 RLRLRL 10 RLRRLLRLRL 10 RRRRLLRLLL 10 RLRLRLRLRL 8 RLRLRLRL
output:
Alice Alice Bob Alice Bob Alice Bob Bob Alice Bob Bob Alice Bob Bob Bob Bob Bob Bob Bob Bob
result:
ok 20 lines
Test #12:
score: -100
Wrong Answer
time: 0ms
memory: 3728kb
input:
1 478 RLRLRLRRLRLLRRLLRLRRLLRRRLLLRLRLRRLLRRRRLLLLRRRLLRLLRRLRLLRRLLRLRLRRLLRLRRLRLLRLRLRRLLRLRLRRLLRLRRRRLLLLRLRLRRLLRLRRRLLLRRRRLLLLRLRLRLRLRRRLLLRLRLRLRRRRLLLLRRLRLRLLRLRLLRRRRRLLLLRLRLRLRLRRLLRRRRLLLLRRLLRLRLRLRLRLRLRLRLRLRLRRLLRLRLRRRLLLRLRRRLLRLLRLRLRRLRLLRRRLRLLLRLRRLLRLRLRRLRLLRLRLRLRLRLRLRL...
output:
Bob
result:
wrong answer 1st lines differ - expected: 'Alice', found: 'Bob'