結果
| 問題 | No.399 動的な領主 |
| ユーザー |
 koyumeishi
|
| 提出日時 | 2016-07-14 00:04:39 |
| 言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
AC
|
| 実行時間 | 211 ms / 2,000 ms |
| コード長 | 8,683 bytes |
| コンパイル時間 | 1,332 ms |
| コンパイル使用メモリ | 113,912 KB |
| 実行使用メモリ | 25,788 KB |
| 最終ジャッジ日時 | 2024-11-07 18:29:26 |
| 合計ジャッジ時間 | 4,346 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge4 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2 ms
5,248 KB |
| testcase_01 | AC | 2 ms
5,248 KB |
| testcase_02 | AC | 2 ms
5,248 KB |
| testcase_03 | AC | 2 ms
5,248 KB |
| testcase_04 | AC | 3 ms
5,248 KB |
| testcase_05 | AC | 16 ms
5,248 KB |
| testcase_06 | AC | 211 ms
19,764 KB |
| testcase_07 | AC | 207 ms
19,800 KB |
| testcase_08 | AC | 202 ms
19,600 KB |
| testcase_09 | AC | 201 ms
19,728 KB |
| testcase_10 | AC | 4 ms
5,248 KB |
| testcase_11 | AC | 15 ms
5,248 KB |
| testcase_12 | AC | 168 ms
20,196 KB |
| testcase_13 | AC | 162 ms
20,052 KB |
| testcase_14 | AC | 138 ms
25,788 KB |
| testcase_15 | AC | 150 ms
25,788 KB |
| testcase_16 | AC | 157 ms
22,332 KB |
| testcase_17 | AC | 206 ms
19,728 KB |
| testcase_18 | AC | 207 ms
19,736 KB |
ソースコード
/*
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##
*/
#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
#include <chrono>
#include <cassert>
using namespace std;
namespace {
using Integer = long long; //__int128;
template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
template<class T> istream& operator , (istream& is, T& val){ return is >> val;}
template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;}
template<class T> ostream& operator , (ostream& os, const T& val){ return os << " " << val;}
template<class H> void print(const H& head){ cout << head; }
template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); }
template<class ... T> void println(const T& ... values){ print(values...); cout << endl; }
template<class H> void eprint(const H& head){ cerr << head; }
template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); }
template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; }
class range{
long long start_, end_, step_;
public:
struct range_iterator{
long long val, step_;
range_iterator(long long v, long long step) : val(v), step_(step) {}
long long operator * (){return val;}
void operator ++ (){val += step_;}
bool operator != (range_iterator& x){return step_ > 0 ? val < x.val : val > x.val;}
};
range(long long len) : start_(0), end_(len), step_(1) {}
range(long long start, long long end) : start_(start), end_(end), step_(1) {}
range(long long start, long long end, long long step) : start_(start), end_(end), step_(step) {}
range_iterator begin(){ return range_iterator(start_, step_); }
range_iterator end(){ return range_iterator( end_, step_); }
};
string operator "" _s (const char* str, size_t size){ return move(string(str)); }
constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);}
constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);}
constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); }
inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexed
mt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count());
template<class T> string join(const vector<T>& v, const string& sep){
stringstream ss; for(int i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str();
}
string operator * (string s, int k){ string ret; while(k){ if(k&1) ret += s; s += s; k >>= 1; } return ret; }
}
class LCA{
int root;
//depth of node[i]
vector<int> d;
//parent of node[i]
vector<vector<int> > p;
int size;
//initialization of depths and parents
void init(vector<vector<int> > &g, int pos, int last, int v){
d[pos] = v;
p[0][pos] = last;
for(int i=0; i<g[pos].size(); i++){
if(g[pos][i] == last) continue;
init(g, g[pos][i], pos, v+1);
}
}
public:
//vector<vector<int> >
//g[i][j] := node[i]'s edge gose to node[ g[i][j] ]
LCA(vector<vector<int> > &g, int r){
int n = g.size();
root = r;
d = vector<int>(n);
size = 1;
while((1<<size) <= n){
size++;
}
p = vector<vector<int> >(size, vector<int>(n));
init(g, root,-1,0);
for(int k=0; k+1 < size; k++){
for(int v=0; v<n; v++){
if(p[k][v] < 0) p[k+1][v] = -1;
else p[k+1][v] = p[k][p[k][v]];
}
}
}
LCA(vector<vector<int> > &g){
int n = g.size();
root = 0;
d = vector<int>(n);
size = 1;
while((1<<size) <= n){
size++;
}
p = vector<vector<int> >(size, vector<int>(n));
//initialize as root = 0
init(g, root,-1,0);
for(int k=0; k+1 < size; k++){
for(int v=0; v<n; v++){
if(p[k][v] < 0) p[k+1][v] = -1;
else p[k+1][v] = p[k][p[k][v]];
}
}
}
//return the node number of lowest common ancestor between u and v
int get_lca(int u, int v){
if(d[u] > d[v]) swap(u,v);
for(int k=0; k<size; k++){
if( (d[v] - d[u]) >> k & 1){
v = p[k][v];
}
}
if(u==v) return u;
for(int k=size-1; k>=0; k--){
if(p[k][u] != p[k][v]) {
u = p[k][u];
v = p[k][v];
}
}
return p[0][u];
}
int get_parent(int u){
return p[0][u];
}
//return depth of node[u]
int depth(int u){
return d[u];
}
};
int main(){
int n;
cin >> n;
vector<vector<int>> G(n+1);
G[0].push_back(1);
G[1].push_back(0);
for(int _ : range(n-1)){
int u,v;
cin >> u,v;
G[u].push_back(v);
G[v].push_back(u);
}
LCA t(G);
vector<long long> s(n+1, 0);
vector<vector<int>> d(n+1);
for(int v : range(1, n+1)){
d[ t.depth(v) ].push_back( v );
}
int q;
cin >> q;
while(q--){
int u,v;
cin >> u,v;
int p = t.get_lca(u,v);
s[u]++;
s[v]++;
s[p]--;
s[ t.get_parent(p) ]--;
}
long long ans = 0;
for(int dd=n; dd>0; dd--){
for(int v : d[dd]){
ans += s[v] * (s[v] + 1) / 2;
s[ t.get_parent(v) ] += s[v];
}
}
println(ans);
return 0;
}