//
// ~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];
int p[MX_N];
vector<int> adj[MX_N];
vector<int> r[MX_N];
vector<pair<int, bool> > ord;
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);
}
//map<pair<int, int>, int> cache;
int cache[5000][5000];
int main(){
cin >> N >> R >> Q;
int c = sqrt(N);
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;
}
vector<int> tmp;
for(auto P : r[i]){
tmp.pb(P);
}
for(auto P : r[j]){
tmp.pb(P);
}
sort(All(tmp));
int cntA = 0, cntB = 0;
int ans = 0;
for(auto ii : tmp){
auto P = ord[ii];
if(H[P.fi] == i){
if(P.se == 0){
++cntA;
}else{
--cntA;
}
}else{
if(P.se == 0){
++cntB;
ans += cntA;
}else{
--cntB;
}
}
}
//cache[make_pair(i, j)] = ans;
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;
}
vector<int> tmp;
for(auto P : r[i]){
tmp.pb(P);
}
for(auto P : r[j]){
tmp.pb(P);
}
sort(All(tmp));
int cntA = 0, cntB = 0;
int ans = 0;
for(auto ii : tmp){
auto P = ord[ii];
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;
//cache[make_pair(i, j)] = ans;
}
}
}
while(Q--){
int r1, r2;
cin >> r1 >> r2;
--r1, --r2;
if((int)r[r1].size() >= c){
cout << cache[r1][r2] << endl;
cout.flush();
}else{
vector<int> tmp;
for(auto P : r[r1]){
tmp.pb(P);
}
for(auto P : r[r2]){
tmp.pb(P);
}
sort(All(tmp));
int cntA = 0, cntB = 0;
int ans = 0;
for(auto ii : tmp){
auto P = ord[ii];
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 |
6 ms |
9672 KB |
Output is correct |
| 2 |
Correct |
6 ms |
9672 KB |
Output is correct |
| 3 |
Correct |
9 ms |
9672 KB |
Output is correct |
| 4 |
Correct |
11 ms |
9800 KB |
Output is correct |
| 5 |
Correct |
17 ms |
9920 KB |
Output is correct |
| 6 |
Correct |
31 ms |
9800 KB |
Output is correct |
| 7 |
Correct |
39 ms |
9800 KB |
Output is correct |
| 8 |
Correct |
51 ms |
9800 KB |
Output is correct |
| 9 |
Correct |
70 ms |
10568 KB |
Output is correct |
| 10 |
Correct |
184 ms |
10468 KB |
Output is correct |
| 11 |
Correct |
481 ms |
12204 KB |
Output is correct |
| 12 |
Correct |
179 ms |
13168 KB |
Output is correct |
| 13 |
Correct |
942 ms |
12852 KB |
Output is correct |
| 14 |
Correct |
2167 ms |
12820 KB |
Output is correct |
| 15 |
Correct |
3674 ms |
16784 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6970 ms |
17208 KB |
Output is correct |
| 2 |
Correct |
7489 ms |
15784 KB |
Output is correct |
| 3 |
Execution timed out |
8086 ms |
20040 KB |
Time limit exceeded |
| 4 |
Execution timed out |
8092 ms |
89396 KB |
Time limit exceeded |
| 5 |
Correct |
4314 ms |
112008 KB |
Output is correct |
| 6 |
Runtime error |
388 ms |
67756 KB |
Execution killed with signal 11 |
| 7 |
Runtime error |
405 ms |
70492 KB |
Execution killed with signal 11 |
| 8 |
Runtime error |
467 ms |
85036 KB |
Execution killed with signal 11 |
| 9 |
Runtime error |
393 ms |
83964 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
475 ms |
97924 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
478 ms |
82956 KB |
Execution killed with signal 11 |
| 12 |
Execution timed out |
8053 ms |
34996 KB |
Time limit exceeded |
| 13 |
Runtime error |
371 ms |
92128 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
1159 ms |
87400 KB |
Execution killed with signal 11 |
| 15 |
Execution timed out |
8028 ms |
40036 KB |
Time limit exceeded |
| 16 |
Runtime error |
439 ms |
117224 KB |
Execution killed with signal 11 |
| 17 |
Runtime error |
1144 ms |
114328 KB |
Execution killed with signal 11 |
