Submission #772294

#TimeUsernameProblemLanguageResultExecution timeMemory
772294NK_Matching (CEOI11_mat)C++17
63 / 100
628 ms65536 KiB
// Success consists of going from failure to failure without loss of enthusiasm #include <bits/stdc++.h> using namespace std; #define nl '\n' #define sz(x) int(x.size()) #define pb push_back using ll = long long; template<class T> using V = vector<T>; const int MOD1 = 1e9+7; const int MOD2 = 998244353; const ll base = 1009; const int nax = 1e6+6; V<ll> POW1, POW2; struct T { ll H1, H2; int len; bool operator==(T a) { return a.H1 == H1 && a.H2 == H2; }; }; T comb(T a, T b) { T c = a; c.len += b.len; c.H1 = ((a.H1 * POW1[b.len]) + b.H1) % MOD1; c.H2 = ((a.H2 * POW2[b.len]) + b.H2) % MOD2; return c; } struct Seg { const T ID = {0, 0, 0}; int N; V<T> seg; void init(int n) { N = 1; while(N < n) N *= 2; seg.assign(2*N, ID); } void pull(int x) { seg[x] = comb(seg[2*x], seg[2*x+1]); } void upd(int p, T v) { seg[p += N] = v; for(p /= 2; p; p /= 2) pull(p); } T qry(int p) { return seg[p += N]; } T get() { return seg[1]; } }; int main() { cin.tie(0)->sync_with_stdio(0); POW1 = POW2 = {1}; for(int t = 0; t < nax; t++) { POW1.pb((POW1.back() * base) % MOD1); POW2.pb((POW2.back() * base) % MOD2); } int N, M; cin >> N >> M; V<int> A(N); for(auto& x : A) { cin >> x; --x; } V<int> B(M); for(auto& x : B) cin >> x; int K = -1; { map<int, int> mp; int cur = 0; for(auto& x : B) mp[x]++; for(auto& p : mp) p.second = cur++; for(auto& x : B) x = mp[x]; K = cur; } // for(auto& x : B) cout << x << " "; // cout << endl; Seg st; st.init(K); // auto print = [&]() { // for(int i = 0; i < K; i++) { // T res = st.qry(i, i); // cout << i << " -> " << res.H1 << " " << res.H2 << " " << res.len << endl; // } // }; T H = {0, 0, 0}, R = {0, 0, 0}, REM = {0, 0, 0}; for(int i = 0; i < N; i++) { H = comb(H, {A[i] + 1, A[i] + 1, 1}); R = comb(R, {1, 1, 1}); } V<int> ans; for(int i = 0; i < N; i++) st.upd(B[i], {i + 1, i + 1, 1}); // for(int i = 1; i <= N; i++) st.upd(B[i], {i + 1 - 1, i + 1 - 1, 1}); // print(); // cout << "H -> " << H.H1 << " " << H.H2 << " " << H.len << endl; // cout << "R -> " << R.H1 << " " << R.H2 << " " << R.len << endl; auto check = [&](int i) { T res = st.get(); // REMOVE REMOVE if ((res.H1 -= REM.H1) < 0) res.H1 += MOD1; if ((res.H2 -= REM.H2) < 0) res.H2 += MOD2; // cout << "REM -> " << REM.H1 << " " << REM.H2 << " " << REM.len << endl; // cout << i << " -> " << res.H1 << " " << res.H2 << " " << res.len << endl; // cout << endl; if (res == H) ans.push_back(i); }; check(0); for(int i = N; i < M; i++) { // ADD R if ((REM.H1 += R.H1) >= MOD1) REM.H1 -= MOD1; if ((REM.H2 += R.H2) >= MOD2) REM.H2 -= MOD2; // ADD i st.upd(B[i], {i + 1, i + 1, 1}); // REMOVE i - N st.upd(B[i - N], {0, 0, 0}); // print(); check(i - N + 1); } cout << size(ans) << nl; for(auto& x : ans) cout << x+1 << " "; cout << nl; return 0; }
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