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commit
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103
S2OJ/1385/1385.cpp
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103
S2OJ/1385/1385.cpp
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#include <iostream>
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#include <algorithm>
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#include <functional>
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#include <iterator>
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#include <vector>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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void solve() {
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std::vector<int> st(3), ed(3);
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std::string s;
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for (int i = 0; i < 3; i++) {
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std::string t;
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cin >> t;
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st[i] = s.size();
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s += t;
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ed[i] = s.size() - 1;
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}
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std::function<int(int)> id = [&](int x) -> int {
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return std::distance(std::begin(ed), std::lower_bound(std::begin(ed), std::end(ed), x));
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};
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int n = s.size();
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std::vector<std::vector<long long>>
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f(n, std::vector<long long>(n)),
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g(3, std::vector<long long>(n)),
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h(3, std::vector<long long>(n));
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long long w = 0, ans = 0;
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for (int i = 0; i < n; i++) {
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for (int j = n - 1; j > i; j--) {
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if (s[i] != s[j]) continue;
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int id_i = id(i),
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id_j = id(j);
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if (id_i == 0 && id_j == 2) {
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f[i][j] = 1;
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}
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f[i][j] += g[id_j][i]; // 加上右边块的贡献
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f[i][j] += h[id_i][j]; // 加上左边块的贡献
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if (id_i == 1 && id_j == 1) {
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f[i][j] += w; // 加上两边来的贡献
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}
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if (i != st[id_i] && j != ed[id_j]) {
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f[i][j] += f[i - 1][j + 1]; // 还在块内,不跳到下一块
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}
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if (id_i == 0 && id_j == 2) {
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w += f[i][j]; // 如果在两边的块,更新贡献
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}
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if (id_j != 0 && i != ed[id_i]) {
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g[id_j - 1][i + 1] += f[i][j]; // 更新到左边块的贡献
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}
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if (id_i != 2 && j != st[id_j]) {
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h[id_i + 1][j - 1] += f[i][j]; // 更新到右边块的贡献
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}
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if (id_i == id_j) {
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if (j - i + 1 <= 3) {
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// j - i + 1 == 2: i, j 相邻,总长度为偶数
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// == 3: i, j 之间还有一个字符,总长度为奇数
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ans += f[i][j];
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}
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} else if (id_i + 1 == id_j) { // i 和 j 在相邻块中
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ans += static_cast<long long>(
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1 // i, j 之间不拼字符,总长度为偶数
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+ (i != ed[id_i]) // 如果 i 不是块末尾,还可以在中间拼一个字符,总长度为奇数
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+ (j != st[id_j]) // 如果 j 不是块开头,还可以在中间拼一个字符,总长度为奇数
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)
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* f[i][j];
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}
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}
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}
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ans += w * (ed[1] - st[1] + 1);
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cout << ans << endl;
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int t;
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cin >> t;
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while (t--) solve();
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return 0;
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}
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