#include <bits/stdc++.h>
#pragma GCC optimize("O2")
#pragma GCC optimize("avx2")
using namespace std;
struct medis{
struct node{
int l, r, val = 0;
};
vector<node> tree;
int n;
int dbInd = 0;
void build(int v){
if(v >= n){
tree[v].l = tree[v].r = dbInd++;
}else{
build(v*2); build(v*2+1);
tree[v].l = tree[v*2].l;
tree[v].r = tree[v*2+1].r;
}
}
medis(int dd){
n = dd;
tree.resize(n * 2 + 1);
}
void change(int v, int l, int r, int x){
if(l <= tree[v].l && tree[v].r <= r){
tree[v].val = x;
}else if(r < tree[v].l || tree[v].r < l){
}else{
change(v*2, l, r, x);
change(v*2+1, l, r, x);
tree[v].val = tree[v*2].l + tree[v*2+1].r;
}
}
int get(int v, int l, int r){
if(l <= tree[v].l && tree[v].r <= r){
return tree[v].val;
}else if(r < tree[v].l || tree[v].r < l){
return 0;
}else{
return get(v*2, l, r) + get(v*2+1, l, r);
}
}
};
const int dydis = 2e5 + 10;
int n, r, q;
vector<int> dideli; // regionai
vector<int> regs[dydis];
int tevas[dydis];
vector<int> gr[dydis];
unordered_map<long long, long long > rem;
int sm[dydis];
int val[dydis];
int kam[dydis];
int sq;
int dbInd = 0;
int kelint[dydis];
int enter[dydis], leave[dydis];
long long dideliuMem1[450][20001], dideliuMem2[450][20001];
medis tree(dydis);
void dfs1(int v, int came){
enter[v] = dbInd++;
for(auto x : gr[v]){
if(x == came) continue;
dfs1(x, v);
}
leave[v] = dbInd;
}
bool isAnc(int a, int b){
return enter[a] <= enter[b] && leave[b] <= leave[a];
}
int kek = 0;
int prm = 0;
void dfs(int v){
// cout << "v = " << v << endl;
sm[v] = val[v];
for(auto x : gr[v]){
if(x == tevas[v]) continue;
kek += val[v];
dfs(x);
kek -= val[v];
sm[v] += sm[x];
}
if(!val[v]){
// cout << "rem[" << prm+1 << "][" << v+1 << "(" << kam[v]+1 << ")] += " << kek << "\n";
// cout << "rem[" << v+1 << "(" << kam[v]+1 << ")][" << prm+1 << "] += " << sm[v] << "\n"
dideliuMem1[prm][kam[v]] += kek;
dideliuMem2[prm][kam[v]] += sm[v];
}
}
int dbIndd = 0;
void calc(int ind){
kelint[ind] = dbIndd++;
// cout << "nuo " << ind+1 << endl;
for(int i = 0; i < n; i++) sm[i] = val[i] = 0;
for(auto x : regs[ind]){
val[x] = 1;
}
kek = 0;
prm = dbIndd-1;
dfs(0);
}
long long f(int a, int b){
if((int)regs[a].size() >= sq){
int sk = kelint[a];
return dideliuMem1[sk][b];
}
if((int)regs[b].size() >= sq){
int sk = kelint[b];
return dideliuMem2[sk][a];
}
if(rem.count(a*dydis+b)) {
return rem[a*dydis+b] ;
}
long long ret = 0;
for(auto x : regs[b]){
tree.change(1, enter[x], enter[x], 1);
}
for(auto x : regs[a]){
ret += tree.get(1, enter[x], leave[x]);
}
for(auto x : regs[b]){
tree.change(1, enter[x], enter[x], -1);
}
return rem[a*dydis+b] = ret;
}
int main(){
cin.tie(NULL);
ios_base::sync_with_stdio(false);
cin >> n >> r >> q;
for(int i = 0; i < n; i++){
int par = -1, reg;
if(i == 0) cin >> reg;
else cin >> par >> reg;
par--; reg--;
regs[reg].push_back(i);
if(par != -2){
gr[i].push_back(par);
gr[par].push_back(i);
}
tevas[i] = par;
kam[i] = reg;
}
dfs1(0, -1);
sq = sqrt(n)-15;
for(int i = 0; i < r; i++){
if((int)regs[i].size() >= sq){
calc(i);
dideli.push_back(i);
}
}
while(q--){
int a, b; cin >> a >> b; a--; b--;
cout << f(a, b) << endl;
}
return 0;
}
Compilation message
regions.cpp:3:28: warning: bad option '-favx2' to pragma 'optimize' [-Wpragmas]
3 | #pragma GCC optimize("avx2")
| ^
regions.cpp:12:21: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
12 | void build(int v){
| ^
regions.cpp:21:17: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
21 | medis(int dd){
| ^
regions.cpp:25:43: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
25 | void change(int v, int l, int r, int x){
| ^
regions.cpp:36:32: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
36 | int get(int v, int l, int r){
| ^
regions.cpp:62:26: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
62 | void dfs1(int v, int came){
| ^
regions.cpp:70:24: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
70 | bool isAnc(int a, int b){
| ^
regions.cpp:75:15: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
75 | void dfs(int v){
| ^
regions.cpp:94:18: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
94 | void calc(int ind){
| ^
regions.cpp:105:25: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
105 | long long f(int a, int b){
| ^
regions.cpp:129:10: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
129 | int main(){
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
14408 KB |
Output is correct |
| 2 |
Correct |
8 ms |
14408 KB |
Output is correct |
| 3 |
Correct |
10 ms |
14536 KB |
Output is correct |
| 4 |
Correct |
14 ms |
14716 KB |
Output is correct |
| 5 |
Incorrect |
18 ms |
14792 KB |
Output isn't correct |
| 6 |
Incorrect |
33 ms |
14552 KB |
Output isn't correct |
| 7 |
Incorrect |
36 ms |
14592 KB |
Output isn't correct |
| 8 |
Incorrect |
53 ms |
14716 KB |
Output isn't correct |
| 9 |
Incorrect |
72 ms |
15040 KB |
Output isn't correct |
| 10 |
Incorrect |
112 ms |
15280 KB |
Output isn't correct |
| 11 |
Incorrect |
121 ms |
15528 KB |
Output isn't correct |
| 12 |
Incorrect |
163 ms |
16156 KB |
Output isn't correct |
| 13 |
Incorrect |
173 ms |
16280 KB |
Output isn't correct |
| 14 |
Incorrect |
253 ms |
17276 KB |
Output isn't correct |
| 15 |
Incorrect |
224 ms |
20144 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
954 ms |
20972 KB |
Output isn't correct |
| 2 |
Incorrect |
1224 ms |
20628 KB |
Output isn't correct |
| 3 |
Incorrect |
1454 ms |
24860 KB |
Output isn't correct |
| 4 |
Incorrect |
317 ms |
19244 KB |
Output isn't correct |
| 5 |
Incorrect |
311 ms |
19128 KB |
Output isn't correct |
| 6 |
Incorrect |
657 ms |
26524 KB |
Output isn't correct |
| 7 |
Incorrect |
808 ms |
28092 KB |
Output isn't correct |
| 8 |
Incorrect |
1222 ms |
42844 KB |
Output isn't correct |
| 9 |
Incorrect |
1549 ms |
29112 KB |
Output isn't correct |
| 10 |
Incorrect |
2468 ms |
65020 KB |
Output isn't correct |
| 11 |
Incorrect |
2952 ms |
35396 KB |
Output isn't correct |
| 12 |
Incorrect |
1235 ms |
28584 KB |
Output isn't correct |
| 13 |
Incorrect |
1458 ms |
30464 KB |
Output isn't correct |
| 14 |
Incorrect |
2170 ms |
37100 KB |
Output isn't correct |
| 15 |
Incorrect |
2359 ms |
37456 KB |
Output isn't correct |
| 16 |
Incorrect |
2634 ms |
44104 KB |
Output isn't correct |
| 17 |
Incorrect |
2674 ms |
49164 KB |
Output isn't correct |
