#include #include #include #include using namespace std; using u64 = uint64_t; u64 uz = time(NULL); inline u64 xorshift64() { uz ^= uz << 18; uz ^= uz >> 19; uz ^= uz << 19; return uz; } template class rolling_hash { static constexpr u64 M = 0xffff'ffff'0000'0001; static constexpr u64 mod_add(u64 a, u64 b) { u64 r = a + b; if(r < a) { return r + 0xffff'ffffU; } return r < M ? r : r - M; } static constexpr u64 mod_sub(u64 a, u64 b) { u64 r = a - b; return a < b ? r + M : r; } static constexpr u64 mod_reduce(u64 b, u64 a) { u64 b1 = b >> 32, b0 = b & 0xffff'ffffU; if(a >= M) { a -= M; } a = mod_sub(a, b0); a = mod_sub(a, b1); a = mod_add(a, b0 << 32); return a; } static constexpr u64 mod_mul(u64 a, u64 b) { u64 a1 = a >> 32, a0 = a & 0xffff'ffffU, b1 = b >> 32, b0 = b & 0xffff'ffffU; a = a1 * b0; b = a0 * b1; u64 x0 = a0 * b0, x2 = a1 * b1; a += b; if(a < b) { x2 += 1UL << 32; } u64 t = a << 32; x0 += t; if(x0 < t) { ++x2; } x2 += a >> 32; return mod_reduce(x2, x0); } T s; u64 b61; size_t n; vector B, H; public: rolling_hash() {} ~rolling_hash() noexcept {} explicit rolling_hash(const T &_s, u64 seed=xorshift64()) : s(_s), b61(seed % (M-8194) + 8193), n(s.size()) { B.resize(n+1); H.resize(n+1); B[0] = 1; for(size_t i=0; i n || r > n) { return -1; } return calc_hash2(l, r-l+1); } u64 calc_hash2(size_t l, size_t len) const { // l から len 文字。1-indexed. assert(1 <= len); assert(l <= n && l+len <= n+1); u64 x = H[l+len-1], yz = mod_mul(B[len], H[l-1]); return x < yz ? M - yz + x : x - yz; } }; int main(void) { cin.tie(nullptr); ios::sync_with_stdio(false); string s; int m; cin >> s >> m; u64 seed = xorshift64(); rolling_hash rh(s, seed); unordered_map mp; for(size_t i=1, n=s.size(); i<=n; ++i) { for(size_t len=1; len<=10 && i+len<=n+1; ++len) { ++mp[rh.calc_hash2(i, len)]; } } int res = 0; for(int i=0; i> ci; rolling_hash rh2(ci, seed); res += mp[rh2.calc_hash(1, ci.size())]; } cout << res << '\n'; return 0; }