| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 677841 |
2023-01-04T12:28:15 Z |
Baytoro |
Regions (IOI09_regions) |
C++17 |
|
6520 ms |
118648 KB |
#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define endl '\n'
void fopn(string name){
freopen((name+".in").c_str(),"r",stdin);
freopen((name+".out").c_str(),"w",stdout);
}
//const long long INF=1e18,mod=998244353;
int n,r,q;
const int N=2e5+5,block=25005;
int a[N],st[N],ed[N],B[N],used[N];
vector<int> g[N],v[block];
int cnt=1;
unordered_map<int,int> clc[block];
void dfs(int x, int p=-1){
st[x]=cnt++;
for(auto it: g[x]){
if(it==p) continue;
dfs(it,x);
}
ed[x]=cnt-1;
}
void solve(){
cin>>n>>r>>q>>a[1];
for(int i=2;i<=n;i++){
int x;cin>>x>>a[i];
g[x].pb(i);
}
int b=sqrt(n);
dfs(1);
for(int i=1;i<=n;i++) B[st[i]]=i;
for(int i=1;i<=n;i++) v[a[B[i]]].pb(st[B[i]]);
for(int i=1;i<=n;i++){
if(used[a[B[i]]]) continue;
if((int)v[a[B[i]]].size()<=b) continue;
used[a[B[i]]]=1;
int pref[n+2]{0};
for(auto it: v[a[B[i]]]){
int l=st[B[it]],r=ed[B[it]];
pref[l]++;
pref[r+1]--;
}
for(int j=1;j<=n;j++){
pref[j]+=pref[j-1];
clc[a[B[j]]][a[B[i]]]+=pref[j];
}
}
while(q--){
int a,b;cin>>a>>b;
int ans=0;
if((int)v[a].size()<=b){
for(auto it: v[a]){
int l=st[B[it]],r=ed[B[it]];
auto i1=upper_bound(all(v[b]),r)-v[b].begin();
auto i2=upper_bound(all(v[b]),l)-v[b].begin();
if(i1){
ans+=max((int)(i1-i2),0);
}
}
}
else
ans=clc[b][a];
cout<<ans<<endl;
}
}
main(){
//fopn("newbarn");
//ios;
int T=1;
//cin>>T;
while(T--){
solve();
}
}
Compilation message
regions.cpp:72:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
72 | main(){
| ^~~~
regions.cpp: In function 'void fopn(std::string)':
regions.cpp:11:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
11 | freopen((name+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regions.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
12 | freopen((name+".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
6864 KB |
Output is correct |
| 2 |
Incorrect |
4 ms |
6864 KB |
Output isn't correct |
| 3 |
Incorrect |
7 ms |
6864 KB |
Output isn't correct |
| 4 |
Incorrect |
8 ms |
6864 KB |
Output isn't correct |
| 5 |
Incorrect |
11 ms |
6892 KB |
Output isn't correct |
| 6 |
Incorrect |
21 ms |
7060 KB |
Output isn't correct |
| 7 |
Incorrect |
38 ms |
7076 KB |
Output isn't correct |
| 8 |
Incorrect |
46 ms |
7024 KB |
Output isn't correct |
| 9 |
Incorrect |
42 ms |
7480 KB |
Output isn't correct |
| 10 |
Incorrect |
56 ms |
7488 KB |
Output isn't correct |
| 11 |
Incorrect |
161 ms |
7836 KB |
Output isn't correct |
| 12 |
Incorrect |
162 ms |
8212 KB |
Output isn't correct |
| 13 |
Incorrect |
197 ms |
7988 KB |
Output isn't correct |
| 14 |
Incorrect |
218 ms |
8900 KB |
Output isn't correct |
| 15 |
Incorrect |
211 ms |
11468 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
915 ms |
12620 KB |
Output isn't correct |
| 2 |
Incorrect |
831 ms |
11752 KB |
Output isn't correct |
| 3 |
Incorrect |
1566 ms |
15820 KB |
Output isn't correct |
| 4 |
Incorrect |
289 ms |
8524 KB |
Output isn't correct |
| 5 |
Incorrect |
302 ms |
10064 KB |
Output isn't correct |
| 6 |
Incorrect |
1661 ms |
27288 KB |
Output isn't correct |
| 7 |
Incorrect |
1896 ms |
31264 KB |
Output isn't correct |
| 8 |
Incorrect |
2108 ms |
57136 KB |
Output isn't correct |
| 9 |
Incorrect |
2498 ms |
15916 KB |
Output isn't correct |
| 10 |
Incorrect |
5754 ms |
118648 KB |
Output isn't correct |
| 11 |
Incorrect |
4062 ms |
15468 KB |
Output isn't correct |
| 12 |
Incorrect |
1410 ms |
20176 KB |
Output isn't correct |
| 13 |
Incorrect |
1732 ms |
19924 KB |
Output isn't correct |
| 14 |
Incorrect |
3430 ms |
33636 KB |
Output isn't correct |
| 15 |
Incorrect |
6054 ms |
25516 KB |
Output isn't correct |
| 16 |
Incorrect |
6520 ms |
31036 KB |
Output isn't correct |
| 17 |
Incorrect |
6359 ms |
42436 KB |
Output isn't correct |
