/* made by amunduzbaev */
#include "bits/stdc++.h"
using namespace std;
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
//~ using namespace __gnu_pbds;
//~ template<class T> using oset = tree<T,
//~ null_type, less_equal<T>, rb_tree_tag,
//~ tree_order_statistics_node_update>;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
#define degub(x) cout<<#x<<" : "<<x<<"\n"
#define GG cout<<"here"<<endl;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
const int N = 2e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
const int B = 1;
#define MULTI 0
int n, m, k, t, q, ans, res, a[N];
int heavy[N], last[N], id[N];
int bs[N / B + 10][N];
int sb[N][N / B + 10];
vii edges[N], cnt[N];
//~ BIG_SMALL BIG_BIG
int cur;
void bsdfs(int u, int p = -1, int cnt = 0){
//~ cout<<cur<<" "<<id[a[u]]<<" "<<a[u]<<" "<<cnt<<"\n";
bs[cur][a[u]] += cnt;
if(id[a[u]] == cur) cnt++;
for(auto x : edges[u]) bsdfs(x, u, cnt);
}
//~ SMALL_BIG
map<int, int> sbdfs(int u, int p = -1){
map<int, int> cnt;
if(heavy[a[u]]) cnt[a[u]]++;
for(auto x : edges[u]) {
map<int, int> tmp = sbdfs(x, u);
if(sz(tmp) > sz(cnt)) swap(cnt, tmp);
for(auto x : tmp) cnt[x.ff] += x.ss;
}
if(!heavy[a[u]]){
for(auto x : cnt) sb[a[u]][x.ff] += x.ss;
} return cnt;
}
int tin[N], tout[N];
void dfs(int u, int p = -1){
tin[u] = t++;
for(auto x : edges[u]) dfs(x, u);
tout[u] = t - 1;
}
bool par(int a, int b) { return (tin[a] <= tin[b] && tout[b] <= tout[a]); }
void solve(int t_case){
cin>>n>>m>>q;
cin>>a[1];
for(int i=2;i<=n;i++){
int p; cin>>p>>a[i];
edges[p].pb(i);
}
for(int i=1;i<=n;i++) cnt[a[i]].pb(i);
int last = 1;
for(int i=1;i<=m;i++){
if(sz(cnt[i]) > B) heavy[i] = 1, id[i] = last++;
}
for(int i=1;i<last;i++) cur = i, bsdfs(1);
sbdfs(1), dfs(1);
for(int i=1;i<=q;i++){
int x, b; cin>>x>>b;
if(heavy[a[x]]) cout<<bs[id[a[x]]][a[b]]<<endl;
else if(heavy[a[b]]) cout<<sb[a[x]][a[b]]<<endl;
else { res = 0;
//~ SMALL_SMALL
for(auto xx : cnt[a[x]])
for(auto y : cnt[a[b]]) res += par(xx, y);
cout<<res<<endl;
}
}
}
signed main(){
NeedForSpeed
if(MULTI){
int t; cin>>t;
for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
} else solve(1);
return 0;
}
Compilation message
regions.cpp: In function 'void usaco(std::string)':
regions.cpp:38:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
38 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regions.cpp:39:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
39 | freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
328 KB |
Output isn't correct |
| 2 |
Incorrect |
1 ms |
456 KB |
Output isn't correct |
| 3 |
Incorrect |
3 ms |
456 KB |
Output isn't correct |
| 4 |
Incorrect |
4 ms |
584 KB |
Output isn't correct |
| 5 |
Incorrect |
5 ms |
584 KB |
Output isn't correct |
| 6 |
Incorrect |
22 ms |
2120 KB |
Output isn't correct |
| 7 |
Incorrect |
32 ms |
1352 KB |
Output isn't correct |
| 8 |
Incorrect |
27 ms |
1736 KB |
Output isn't correct |
| 9 |
Runtime error |
13 ms |
4500 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
5 ms |
840 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
12 ms |
4164 KB |
Execution killed with signal 11 |
| 12 |
Runtime error |
15 ms |
7112 KB |
Execution killed with signal 11 |
| 13 |
Runtime error |
11 ms |
3136 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
9 ms |
2808 KB |
Execution killed with signal 11 |
| 15 |
Runtime error |
9 ms |
3960 KB |
Execution killed with signal 11 |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
3256 KB |
Execution killed with signal 11 |
| 2 |
Runtime error |
5 ms |
880 KB |
Execution killed with signal 11 |
| 3 |
Runtime error |
11 ms |
3400 KB |
Execution killed with signal 11 |
| 4 |
Runtime error |
4 ms |
712 KB |
Execution killed with signal 6 |
| 5 |
Runtime error |
40 ms |
43388 KB |
Execution killed with signal 11 |
| 6 |
Runtime error |
5 ms |
712 KB |
Execution killed with signal 11 |
| 7 |
Runtime error |
5 ms |
780 KB |
Execution killed with signal 11 |
| 8 |
Runtime error |
6 ms |
712 KB |
Execution killed with signal 11 |
| 9 |
Runtime error |
5 ms |
796 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
5 ms |
840 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
4 ms |
712 KB |
Execution killed with signal 11 |
| 12 |
Runtime error |
5 ms |
712 KB |
Execution killed with signal 11 |
| 13 |
Runtime error |
5 ms |
712 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
7 ms |
900 KB |
Execution killed with signal 6 |
| 15 |
Runtime error |
5 ms |
712 KB |
Execution killed with signal 11 |
| 16 |
Runtime error |
5 ms |
1224 KB |
Execution killed with signal 6 |
| 17 |
Runtime error |
5 ms |
840 KB |
Execution killed with signal 11 |
