結果
| 問題 | No.8016 unordered_mapなるたけ落とすマン |
| ユーザー |
tonegawa
|
| 提出日時 | 2020-11-25 03:38:19 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 58 ms / 1,000 ms |
| コード長 | 3,793 bytes |
| 記録 | |
| コンパイル時間 | 1,445 ms |
| コンパイル使用メモリ | 129,860 KB |
| 最終ジャッジ日時 | 2025-01-16 05:35:24 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 48 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:150:16: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
150 | ll n, m;scanf("%lld %lld", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
main.cpp:153:15: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
153 | ll a;scanf("%lld", &a);
| ~~~~~^~~~~~~~~~~~
main.cpp:158:15: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
158 | ll a;scanf("%lld", &a);
| ~~~~~^~~~~~~~~~~~
ソースコード
#include <iostream>
#include <string>
#include <vector>
#include <array>
#include <stack>
#include <queue>
#include <deque>
#include <algorithm>
#include <set>
#include <map>
#include <bitset>
#include <cmath>
#include <functional>
#include <cassert>
#include <iomanip>
#include <numeric>
#include <random>
#define vll vector<ll>
#define vvvl vector<vvl>
#define vvl vector<vector<ll>>
#define VV(a, b, c, d) vector<vector<d>>(a, vector<d>(b, c))
#define VVV(a, b, c, d) vector<vvl>(a, vvl(b, vll (c, d)));
#define re(c, b) for(ll c=0;c<b;c++)
#define all(obj) (obj).begin(), (obj).end()
typedef long long int ll;
typedef long double ld;
using namespace std;
#include <type_traits>
#include <typeinfo>
template<typename Key, typename Val>
struct hashmap{
private:
float load_factor = 0.8;
int table_size = 16;
int mod = 15;
Key null_key;
uint32_t mask;
int valid_size;
vector<int> idx_table;
vector<pair<Key, Val>> data;
function<uint32_t(Key)> f = std::hash<uint32_t>();
void expand_table(){
table_size *= 2;
mod = table_size - 1;
idx_table.resize(table_size);
fill(idx_table.begin(), idx_table.end(), -1);
for(int i=0;i<data.size();i++){
if(data[i].first==null_key) continue;
inner_emplace(i);
}
}
void inner_emplace(int idx){
Key k = data[idx].first;
uint32_t h = f(k^mask) & mod;
while(true){
if(idx_table[h]==-1){
idx_table[h] = idx;
return;
}
h = (h + 1) & mod;
}
}
public:
hashmap():
null_key(std::numeric_limits<Key>::max()),
mask(random_device()()), valid_size(0),
idx_table(table_size, -1){}
int size(){
return valid_size;
}
void emplace(Key k, Val v){
assert(k!=null_key);
uint32_t h = f(k^mask) & mod;
while(true){
int idx = idx_table[h];
if(idx!=-1){
if(data[idx].first==k) return;
h = (h + 1) & mod;
}else{
data.push_back({k, v});
idx_table[h] = int(data.size()) - 1;
valid_size++;
if(float(data.size())>load_factor*float(table_size)){
expand_table();
}
return;
}
}
}
void overwrite(Key k, Val v){
assert(k!=null_key);
uint32_t h = f(k^mask) & mod;
while(true){
int idx = idx_table[h];
if(idx!=-1){
if(data[idx].first==k){
data[idx].second = v;
return;
}
h = (h + 1) & mod;
}else{
data.push_back({k, v});
idx_table[h] = int(data.size()) - 1;
valid_size++;
if(float(data.size())>load_factor*float(table_size)){
expand_table();
}
return;
}
}
}
void erase(Key k){
assert(k!=null_key);
uint32_t h = f(k^mask) & mod;
while(true){
int idx = idx_table[h];
if(idx==-1) return;
if(data[idx].first==k){
data[idx].first = null_key;
valid_size--;
return;
}
h = (h + 1) & mod;
}
}
bool contain(Key k){
assert(k!=null_key);
uint32_t h = f(k^mask) & mod;
while(true){
if(idx_table[h]==-1) return false;
if(data[idx_table[h]].first==k) return true;
h = (h + 1) & mod;
}
}
Val at(Key k){
assert(k!=null_key);
uint32_t h = f(k^mask) & mod;
while(true){
int idx = idx_table[h];
assert(idx!=-1);
if(data[idx].first==k) return data[idx].second;
h = (h + 1) & mod;
}
}
};
int main(){
ll n, m;scanf("%lld %lld", &n, &m);
hashmap<ll, int> mp;
for(int i=0;i<n;i++){
ll a;scanf("%lld", &a);
if(mp.contain(a)) mp.overwrite(a, mp.at(a)+1);
else mp.emplace(a, 1);
}
for(int i=0;i<m;i++){
ll a;scanf("%lld", &a);
int ans = (mp.contain(a)?mp.at(a):0);
if(i==m-1) printf("%d\n", ans);
else printf("%d ", ans);
}
}
tonegawa