#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
int p1[6002], p2[6002];
void fill_p(string s, int *p) {
for (int i = 1; i < s.size(); i++) {
int j = p[i - 1];
while (j && s[i] != s[j]) j = p[j - 1];
if (s[i] == s[j]) j++;
p[i] = j;
}
}
tuple<int, int, int> solve(string s, string t, bool rev) {
int n = s.size(), m = t.size();
tuple<int, int, int> ans = {0, 0, 0};
for (int i = 0; i < n; i++) {
string s1 = s.substr(0, i), s2 = s.substr(i, n - i);
reverse(s1.begin(), s1.end());
string t1 = t, t2 = t;
reverse(t2.begin(), t2.end());
fill_p(s1 + "#" + t1, p1), fill_p(s2 + "#" + t2, p2);
for (int j = 1; j <= m; j++)
ans = max(ans, {
p1[i + j] + p2[n + m - i - j],
i - p1[i + j],
rev ? m - j - p2[n + m - i - j] : j - p1[i + j]
});
}
return ans;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
string s, t;
cin >> s >> t;
tuple<int, int, int> ans = solve(s, t, false);
reverse(t.begin(), t.end());
ans = max(ans, solve(s, t, true));
cout << get<0>(ans) << '\n' << get<1>(ans) << ' ' << get<2>(ans);
return 0;
}
Compilation message
necklace.cpp: In function 'void fill_p(std::string, int*)':
necklace.cpp:8:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | for (int i = 1; i < s.size(); i++) {
| ~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
300 ms |
444 KB |
Output is correct |
| 2 |
Correct |
254 ms |
452 KB |
Output is correct |
| 3 |
Correct |
346 ms |
688 KB |
Output is correct |
| 4 |
Correct |
246 ms |
456 KB |
Output is correct |
| 5 |
Correct |
162 ms |
464 KB |
Output is correct |
| 6 |
Correct |
173 ms |
460 KB |
Output is correct |
| 7 |
Correct |
209 ms |
452 KB |
Output is correct |
| 8 |
Correct |
256 ms |
464 KB |
Output is correct |
| 9 |
Correct |
305 ms |
428 KB |
Output is correct |
