#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i)) #define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i)) #define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i)) #if defined(_MSC_VER) || __cplusplus > 199711L #define aut(r,v) auto r = (v) #else #define aut(r,v) __typeof(v) r = (v) #endif #define each(it,o) for(aut(it, (o).begin()); it != (o).end(); ++ it) #define all(o) (o).begin(), (o).end() #define pb(x) push_back(x) #define mp(x,y) make_pair((x),(y)) #define mset(m,v) memset(m,v,sizeof(m)) #define INF 0x3f3f3f3f #define INFL 0x3f3f3f3f3f3f3f3fLL using namespace std; typedef vector vi; typedef pair pii; typedef vector > vpii; typedef long long ll; template inline void amin(T &x, U y) { if(y < x) x = y; } template inline void amax(T &x, U y) { if(x < y) x = y; } class FastInput { bool _end; public: FastInput() : _end(false) {} operator void*() { return _end ? 0 : (void*)this; } template void read_unsigned(T *res) { T x = 0; for(char c = skip(); '0' <= c && c <= '9'; c = gc()) x = x * 10 + (c - '0'); *res = x; } template void read_signed(T *res) { char c = skip(); bool sign = false; if(c == '-') sign = true, c = gc(); T x = 0; for(; '0' <= c && c <= '9'; c = gc()) x = x * 10 + (c - '0'); *res = !sign ? x : -x; } void read_c_string(char *str, int *len) { int n = 0; for(char c = skip(); !is_delim(c); c = gc()) str[n ++] = c; str[n] = 0; *len = n; } void read_string(std::string *str) { str->clear(); for(char c = skip(); !is_delim(c); c = gc()) *str += c; } void read_line(std::string *str) { str->clear(); for(char c = gc(); c != '\n'; c = gc()) *str += c; if(!str->empty() && (*str)[str->size() - 1] == '\r') str->resize(str->size() - 1); } void read_double(double *res) { std::string buf; read_string(&buf); sscanf(buf.c_str(), "%lf", res); } void read_char(char *res) { *res = skip(); } void read_string_buf(char *res, int n) { *res = skip(); } FastInput &operator()(char &res) { read_char(&res); return *this; } FastInput &operator()(int &res) { read_signed(&res); return *this; } FastInput &operator()(unsigned &res) { read_unsigned(&res); return *this; } FastInput &operator()(long long &res) { read_signed(&res); return *this; } FastInput &operator()(unsigned long long &res) { read_unsigned(&res); return *this; } FastInput &operator()(char *res) { int len; read_c_string(res, &len); return *this; } FastInput &operator()(std::string &res) { read_string(&res); return *this; } FastInput &operator()(double &res) { read_double(&res); return *this; } template FastInput &operator()(T1 &res1, T2 &res2) { return operator()(res1)(res2); } template FastInput &operator()(T1 &res1, T2 &res2, T3 &res3) { return operator()(res1)(res2)(res3); } template FastInput &a(T *a, int n) { for(int i = 0; i < n; ++ i) operator()(a[i]); return *this; } template FastInput &operator()(vector &v) { for(size_t i = 0; i < v.size(); ++ i) operator()(v[i]); return *this; } private: static char gc() { #if defined(__GNUC__) && !defined(__MINGW32__) return (char)getchar_unlocked(); #elif defined(_MSC_VER) return (char)_getchar_nolock(); #else return (char)getchar(); #endif } static bool is_delim(char c) { return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == EOF; } char skip() { if(_end) return EOF; char c; for(c = gc(); c != -1 && is_delim(c); c = gc()); if(c == EOF) _end = true; return c; } } in; class FastOutput { public: template void print_unsigned(T x) { char buf[24]; int n = 0; do buf[n ++] = x % 10, x /= 10; while(x != 0); while(n > 0) pc('0' + buf[-- n]); } template void print_signed(T x) { char buf[24]; int n = 0; bool sign = false; if(x < 0) sign = true; //depends on the -x % y behaviour do buf[n ++] = x % 10, x /= 10; while(x != 0); if(!sign) { while(n > 0) pc('0' + buf[-- n]); } else { pc('-'); while(n > 0) pc('0' - buf[-- n]); } } void print_c_string(const char *str) { for(const char *p = str; *p; ++ p) pc(*p); } void print_string(const std::string &str) { print_c_string(str.c_str()); } void print_double(double x, int digits) { //|res| < 2^1024 ~ 10^308 char buf[512]; #ifdef _MSC_VER sprintf_s(buf, "%.*f", digits, x); #else sprintf(buf, "%.*f", digits, x); #endif print_c_string(buf); } void print_char(char x) { pc(x); } FastOutput &operator()(char x) { print_char(x); return *this; } FastOutput &operator()(int x) { print_signed(x); return *this; } FastOutput &operator()(unsigned x) { print_unsigned(x); return *this; } FastOutput &operator()(long long x) { print_signed(x); return *this; } FastOutput &operator()(unsigned long long x) { print_unsigned(x); return *this; } FastOutput &operator()(const char *str) { print_c_string(str); return *this; } FastOutput &operator()(const std::string &str) { print_string(str); return *this; } FastOutput &operator()(double x) { print_double(x, 10); return *this; } template FastOutput &operator()(T1 x1, T2 x2) { return operator()(x1)(x2); } template FastOutput &operator()(T1 x1, T2 x2, T3 x3) { return operator()(x1)(x2)(x3); } template FastOutput &operator()(T1 x1, T2 x2, T3 x3, T4 x4) { return operator()(x1)(x2)(x3)(x4); } private: static void pc(char c) { #if defined(__GNUC__) && !defined(__MINGW32__) putchar_unlocked(c); #elif defined(_MSC_VER) _putchar_nolock(c); #else putchar(c); #endif } } out; struct HashTable { public: static unsigned long long a1, a0; typedef unsigned long long Key; typedef int Val; struct KeyVal { Key key; Val val; KeyVal() {} KeyVal(const Key &key_, const Val &val_) : key(key_), val(val_) {} }; typedef int Size, Index; class ConstIterator { friend HashTable; const HashTable *hashTable; const KeyVal *p, *pEnd; explicit ConstIterator(const HashTable *hashTable_, const KeyVal *p_, const KeyVal *pEnd_) : hashTable(hashTable_), p(p_), pEnd(pEnd_) { skip(); } void skip() { while(p != pEnd && hashTable->isEmptyKey(p->key)) ++ p; } public: ConstIterator() : p(NULL), pEnd(NULL) {} const KeyVal &operator*() const { return *p; } ConstIterator &operator++() { ++ p; skip(); return *this; } bool operator!=(const ConstIterator &that) const { return p != that.p; } }; KeyVal emptyKeyVal() const { return{ ~0ULL, 0 }; } Index hash(const Key &key) const { return (Index)((a1 * key + a0) >> 32); } bool equals(const Key &key1, const Key &key2) const { return key1 == key2; } bool isEmptyKey(const Key &key) const { return key == emptyKeyVal().key; } public: HashTable(Size minCapacity = 0) : table(NULL), tableSize(0), numElements(0) { reserve(minCapacity); } HashTable(const HashTable &that) : table(NULL), tableSize(0), numElements(0) { *this = that; } HashTable &operator=(const HashTable &that) { if(this == &that) return *this; numElements = 0; // reserve(that.numElements); clear(); copyTable(that.table, that.table + that.tableSize); numElements = that.numElements; return *this; } ~HashTable() { delete[] table; table = NULL; } void swap(HashTable &that) { std::swap(table, that.table); std::swap(tableSize, that.tableSize); std::swap(numElements, that.numElements); } void clear() { for(KeyVal *p = table, *pEnd = p + tableSize; p != pEnd; ++ p) if(!isEmptyKey(p->key)) *p = emptyKeyVal(); numElements = 0; } bool empty() const { return numElements == 0; } Size size() const { return numElements; } Size capacity() const { return calculateCapacity(tableSize); } bool reserve(Size minCapacity) { if(minCapacity <= calculateCapacity(tableSize)) return false; Size newSize = tableSize == 0 ? 4 : tableSize * 2; while(calculateCapacity(newSize) < minCapacity) newSize *= 2; reallocate(newSize); return true; } ConstIterator begin() const { return ConstIterator(this, table, table + tableSize); } ConstIterator end() const { return ConstIterator(this, table + tableSize, table + tableSize); } private: static Size calculateCapacity(Size tableSize) { return tableSize * 3 / 4; } void copyTable(const KeyVal *p, const KeyVal *pEnd) { for(; p != pEnd; ++ p) { if(!isEmptyKey(p->key)) { Index index; bool found = probe(p->key, index); assert(!found); table[index] = *p; } } } void reallocate(Size newSize) { assert(newSize > tableSize && (newSize & (newSize - 1)) == 0); KeyVal *oldTable = table; Size oldSize = tableSize; table = new KeyVal[newSize]; tableSize = newSize; std::fill(table, table + tableSize, emptyKeyVal()); if(numElements != 0) copyTable(oldTable, oldTable + oldSize); delete[] oldTable; } bool probe(const Key &key, Index &resIndex) const { assert(numElements < tableSize); Size mask = tableSize - 1; Index h = hash(key) & mask, numProbes = 0; while(1) { const KeyVal &kv = table[h]; if(isEmptyKey(kv.key)) { resIndex = h; return false; } else if(equals(kv.key, key)) { resIndex = h; return true; } ++ numProbes; h = (h + numProbes) & mask; assert(numProbes < tableSize); } } public: bool insert(const Key &key, const Val &val) { reserve(numElements + 1); Index index; bool found = probe(key, index); table[index] = KeyVal(key, val); ++ numElements; return found; } const Val *find(const Key &key) const { if(empty()) return NULL; Index index; bool found = probe(key, index); if(!found) return NULL; return &table[index].val; } Val *find(const Key &key) { return const_cast(const_cast(this)->find(key)); } Val getVal(const Key &key) const { const Val *p = find(key); return !p ? Val() : *p; } Val *findInsert(const Key &key, const Val &val) { reserve(numElements + 1); Index index; bool found = probe(key, index); if(!found) { table[index] = KeyVal(key, val); ++ numElements; } return &table[index].val; } private: KeyVal *table; Size tableSize; //power of two (or 0) Size numElements; //number of nonempty elements }; unsigned long long HashTable::a0, HashTable::a1; int main() { mt19937_64 mt{ random_device{}() }; HashTable::a1 = mt(); HashTable::a0 = mt(); int N; int M; while(in(N, M)) { HashTable table; table.reserve(200000); rep(i, N) { long long a; in(a); ++ *table.findInsert(a, 0); } rep(i, M) { long long b; in(b); auto p = table.find(b); int ans = !p ? 0 : *p; if(i != 0) out(' '); out(ans); } out('\n'); } return 0; }