//
// ~oisín~ C++ Template
//
#include <bits/stdc++.h>
#define MX_N 200005
#define mp make_pair
#define mod7 1000000007
#define modpi 314159
#define PI 3.141592653589793238
#define pb push_back
#define FastIO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define All(a) a.begin(),a.end()
#define fi first
#define se second
#define ll long long int
#define ull unsigned long long int
int kx[8] = {+2, +2, -2, -2, +1, +1, -1, -1};
int ky[8] = {+1, -1, +1, -1, +2, -2, +2, -2};
int d9x[9] = {+1, +1, +1, +0, +0, +0, -1, -1, -1};
int d9y[9] = {+1, +0, -1, +1, +0, -1, +1, +0, -1};
int dx4[4] = {+0, +0, +1, -1};
int dy4[4] = {+1, -1, +0, +0};
ll gcd(ull a, ull b){
return (a==0)?b:gcd(b%a,a);
}
ll lcm(ull a, ull b){
return a*(b/gcd(a,b));
}
const long long INF = 1e18;
using namespace std;
int N, R, Q;
int H[MX_N], p[MX_N];
vector<int> adj[MX_N], r[25001];
vector<pair<int, bool> > ord;
unordered_map<int, int> cache[25001];
void dfs(int at){
ord.pb({at, 0});
r[H[at]].pb((int)ord.size()-1);
for(int to : adj[at]){
if(p[at] == to){
continue;
}
dfs(to);
}
ord.pb({at, 1});
r[H[at]].pb((int)ord.size()-1);
}
int main(){
cin >> N >> R >> Q;
int c = 10000;
// int c = sqrt(N);
// int c = 1000000000;
cin >> H[0];
--H[0];
for(int i=1;i<N;++i){
cin >> p[i] >> H[i];
--p[i], --H[i];
adj[p[i]].pb(i);
}
dfs(0);
for(int j=0;j<R;++j){
if((int)r[j].size() >= c){
for(int i=0;i<R;++i){
if(i == j){
continue;
}
int x = 0, y = 0;
int cur;
int cntA = 0, cntB = 0;
int ans = 0;
while(true){
if(x == (int)r[i].size() && y == (int)r[j].size()){
break;
}else if(x == (int)r[i].size()){
cur = r[j][y];
++y;
}else if(y == (int)r[j].size()){
cur = r[i][x];
++x;
}else{
if(r[i][x] < r[j][y]){
cur = r[i][x];
++x;
}else{
cur = r[j][y];
++y;
}
}
auto P = ord[cur];
if(H[P.fi] == i){
if(P.se == 0){
++cntA;
}else{
--cntA;
}
}else{
if(P.se == 0){
++cntB;
ans += cntA;
}else{
--cntB;
}
}
}
cache[i][j] = ans;
}
}
}
for(int i=0;i<R;++i){
if((int)r[i].size() >= c){
for(int j=0;j<R;++j){
if(i == j){
continue;
}
int x = 0, y = 0;
int cur;
int cntA = 0, cntB = 0;
int ans = 0;
while(true){
if(x == (int)r[i].size() && y == (int)r[j].size()){
break;
}else if(x == (int)r[i].size()){
cur = r[j][y];
++y;
}else if(y == (int)r[j].size()){
cur = r[i][x];
++x;
}else{
if(r[i][x] < r[j][y]){
cur = r[i][x];
++x;
}else{
cur = r[j][y];
++y;
}
}
auto P = ord[cur];
if(H[P.fi] == i){
if(P.se == 0){
++cntA;
}else{
--cntA;
}
}else{
if(P.se == 0){
++cntB;
ans += cntA;
}else{
--cntB;
}
}
}
cache[i][j] = ans;
}
}
}
while(Q--){
int r1, r2;
cin >> r1 >> r2;
--r1, --r2;
if((int)r[r1].size() >= c || (int)r[r2].size() >= c){
cout << cache[r1][r2] << endl;
cout.flush();
}else{
int x = 0, y = 0;
int cur;
int cntA = 0, cntB = 0;
int ans = 0;
while(true){
if(x == (int)r[r1].size() && y == (int)r[r2].size()){
break;
}else if(x == (int)r[r1].size()){
cur = r[r2][y];
++y;
}else if(y == (int)r[r2].size()){
cur = r[r1][x];
++x;
}else{
if(r[r1][x] < r[r2][y]){
cur = r[r1][x];
++x;
}else{
cur = r[r2][y];
++y;
}
}
auto P = ord[cur];
if(H[P.fi] == r1){
if(P.se == 0){
++cntA;
}else{
--cntA;
}
}else{
if(P.se == 0){
++cntB;
ans += cntA;
}else{
--cntB;
}
}
}
cout << ans << endl;
cout.flush();
}
}
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
6856 KB |
Output is correct |
| 2 |
Correct |
4 ms |
6856 KB |
Output is correct |
| 3 |
Correct |
7 ms |
6856 KB |
Output is correct |
| 4 |
Correct |
11 ms |
6856 KB |
Output is correct |
| 5 |
Correct |
15 ms |
6984 KB |
Output is correct |
| 6 |
Correct |
35 ms |
6984 KB |
Output is correct |
| 7 |
Correct |
35 ms |
6984 KB |
Output is correct |
| 8 |
Correct |
24 ms |
7112 KB |
Output is correct |
| 9 |
Correct |
54 ms |
7752 KB |
Output is correct |
| 10 |
Correct |
93 ms |
7764 KB |
Output is correct |
| 11 |
Correct |
116 ms |
8004 KB |
Output is correct |
| 12 |
Correct |
206 ms |
8772 KB |
Output is correct |
| 13 |
Correct |
197 ms |
8196 KB |
Output is correct |
| 14 |
Correct |
243 ms |
8968 KB |
Output is correct |
| 15 |
Correct |
317 ms |
13152 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1490 ms |
13744 KB |
Output is correct |
| 2 |
Correct |
1613 ms |
12076 KB |
Output is correct |
| 3 |
Correct |
2475 ms |
16056 KB |
Output is correct |
| 4 |
Correct |
310 ms |
8912 KB |
Output is correct |
| 5 |
Correct |
456 ms |
11832 KB |
Output is correct |
| 6 |
Correct |
954 ms |
10552 KB |
Output is correct |
| 7 |
Correct |
1557 ms |
12656 KB |
Output is correct |
| 8 |
Correct |
1552 ms |
19252 KB |
Output is correct |
| 9 |
Correct |
2588 ms |
19904 KB |
Output is correct |
| 10 |
Correct |
3036 ms |
26840 KB |
Output is correct |
| 11 |
Correct |
3189 ms |
18224 KB |
Output is correct |
| 12 |
Execution timed out |
8005 ms |
23444 KB |
Time limit exceeded |
| 13 |
Execution timed out |
8028 ms |
24256 KB |
Time limit exceeded |
| 14 |
Execution timed out |
8039 ms |
23600 KB |
Time limit exceeded |
| 15 |
Execution timed out |
8090 ms |
30168 KB |
Time limit exceeded |
| 16 |
Execution timed out |
8093 ms |
40240 KB |
Time limit exceeded |
| 17 |
Execution timed out |
8093 ms |
37916 KB |
Time limit exceeded |
