#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
#pragma GCC optimize ("Ofast")
#define double ld
#define F first
#define S second
#define vi vector<int>
#define vvi vector<vi>
#define pi pair<int, int>
#define vpi vector<pi>
#define vb vector<bool>
#define vvb vector<vb>
#define pb push_back
#define ppb pop_back
#define read(a) for(auto &x:a) cin >> x;
#define print(a) for(auto x:a) cout << x << " "; cout << "\n";
#define rs resize
#define as assign
#define vc vector<char>
#define vvc vector<vc>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define MP make_pair
#define int long long
const int inf = 2e9;
const int INF = 4e18;
void solve(){
int n, r, q; cin >> n >> r >> q;
vvi adj(n+1), R(r+1);
vi h(n+1);
cin >> h[1]; R[h[1]].pb(1);
for(int i=2; i<=n; i++){
int p; cin >> p;
adj[p].pb(i);
cin >> h[i];
R[h[i]].pb(i);
}
vi in(n+1), sub(n+1);
int time = 0;
function<void(int)> dfs = [&](int s){
in[s] = time++;
sub[s] = 1;
for(auto u:adj[s]){
dfs(u);
sub[s] += sub[u];
}
};
dfs(1);
for(int i=1; i<=r; i++)
sort(all(R[i]), [&](int a, int b){
return in[a] < in[b];
});
int sq = sqrt(n);
map<int, int> mp;
map<pi, int> ans, ans2;
function<void(int)> dfs2 = [&](int s){
if(R[h[s]].size() > sq)
for(auto &[el, ti]:mp)
if(el != h[s]) ans[{el, h[s]}] += ti;
mp[h[s]]++;
for(auto u:adj[s])
dfs2(u);
mp[h[s]]--;
if(mp[h[s]] == 0) mp.erase(h[s]);
};
dfs2(1);
for(int i=1; i<=r; i++){
if(R[i].size() <= sq) continue;
function<void(int, int)> dfs3 = [&](int s, int cnt){
if(h[s] == i) cnt++;
else if(cnt > 0) ans2[{i, h[s]}] += cnt;
for(auto u:adj[s])
dfs3(u, cnt);
};
dfs3(1, 0);
}
while(q--){
int r1, r2; cin >> r1 >> r2;
if(r2 > sq) cout << ans[{r1, r2}] << endl;
else if(r1 > sq) cout << ans2[{r1, r2}] << endl;
else {
int sum = 0;
for(int i=0; i<R[r1].size(); i++)
for(int j=0; j<R[r2].size(); j++)
if(in[R[r1][i]] <= in[R[r2][j]] && in[R[r2][j]] < in[R[r1][i]]+sub[R[r1][i]]) sum++;
cout << sum << endl;
}
}
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
// #ifndef ONLINE_JUDGE
// freopen("in.txt", "r", stdin);
// freopen("out.txt", "w", stdout);
// #endif
solve();
return 0;
}
Compilation message
regions.cpp: In lambda function:
regions.cpp:67:21: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
67 | if(R[h[s]].size() > sq)
| ~~~~~~~~~~~~~~~^~~~
regions.cpp: In function 'void solve()':
regions.cpp:81:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
81 | if(R[i].size() <= sq) continue;
| ~~~~~~~~~~~~^~~~~
regions.cpp:98:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
98 | for(int i=0; i<R[r1].size(); i++)
| ~^~~~~~~~~~~~~
regions.cpp:99:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
99 | for(int j=0; j<R[r2].size(); j++)
| ~^~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
208 KB |
Output isn't correct |
| 3 |
Incorrect |
2 ms |
208 KB |
Output isn't correct |
| 4 |
Incorrect |
3 ms |
336 KB |
Output isn't correct |
| 5 |
Incorrect |
8 ms |
388 KB |
Output isn't correct |
| 6 |
Incorrect |
19 ms |
564 KB |
Output isn't correct |
| 7 |
Incorrect |
23 ms |
584 KB |
Output isn't correct |
| 8 |
Incorrect |
28 ms |
624 KB |
Output isn't correct |
| 9 |
Incorrect |
48 ms |
1664 KB |
Output isn't correct |
| 10 |
Incorrect |
65 ms |
1580 KB |
Output isn't correct |
| 11 |
Incorrect |
101 ms |
2148 KB |
Output isn't correct |
| 12 |
Incorrect |
103 ms |
3260 KB |
Output isn't correct |
| 13 |
Incorrect |
144 ms |
2852 KB |
Output isn't correct |
| 14 |
Incorrect |
358 ms |
3436 KB |
Output isn't correct |
| 15 |
Incorrect |
573 ms |
9420 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
8029 ms |
9316 KB |
Time limit exceeded |
| 2 |
Execution timed out |
8031 ms |
7204 KB |
Time limit exceeded |
| 3 |
Execution timed out |
8041 ms |
12912 KB |
Time limit exceeded |
| 4 |
Incorrect |
186 ms |
4848 KB |
Output isn't correct |
| 5 |
Incorrect |
159 ms |
9084 KB |
Output isn't correct |
| 6 |
Execution timed out |
8045 ms |
22528 KB |
Time limit exceeded |
| 7 |
Execution timed out |
8018 ms |
63756 KB |
Time limit exceeded |
| 8 |
Execution timed out |
8095 ms |
41424 KB |
Time limit exceeded |
| 9 |
Incorrect |
1321 ms |
24856 KB |
Output isn't correct |
| 10 |
Execution timed out |
8087 ms |
53156 KB |
Time limit exceeded |
| 11 |
Incorrect |
1544 ms |
29136 KB |
Output isn't correct |
| 12 |
Incorrect |
4272 ms |
25396 KB |
Output isn't correct |
| 13 |
Execution timed out |
8003 ms |
23612 KB |
Time limit exceeded |
| 14 |
Execution timed out |
8084 ms |
28864 KB |
Time limit exceeded |
| 15 |
Execution timed out |
8092 ms |
28644 KB |
Time limit exceeded |
| 16 |
Execution timed out |
8089 ms |
36272 KB |
Time limit exceeded |
| 17 |
Execution timed out |
8093 ms |
42844 KB |
Time limit exceeded |
