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Submission #1083719

# Submission time Handle Problem Language Result Execution time Memory
1083719 2024-09-03T21:55:52 Z rayan_bd Regions (IOI09_regions) C++17
0 / 100
 994 ms 131072 KB 
#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define ll long long

const int mxN = 2e5 + 5000;

set<ll> adj[mxN];
ll hd[mxN];
map<ll,vector<ll>> same;
vector<map<ll,ll>> seg(mxN*4);
ll st[mxN],en[mxN],lt[mxN],tin=-1;

void answer(ll ans){
	cout.flush()<<ans<<'\n';
    cout.flush();
}

void build(ll node,ll start,ll end){
	if(start==end){
		seg[node][hd[lt[start]]]=1;
		return;
	}
	ll mid=start+(end-start)/2;
	build(node*2+1,start,mid);
	build(node*2+2,mid+1,end);
	for(auto it:seg[node*2+1]) seg[node][it.first]=it.second;
	for(auto it:seg[node*2+2]) seg[node][it.first]+=it.second;
}

void dfs(ll u=1,ll par=-1){
	st[u]=++tin;
	lt[tin]=u;
	for(auto it:adj[u]){
		if(it^par){
			dfs(it,u);
		}
	}
	en[u]=tin;
}

ll qry(ll node,ll start,ll end,ll l,ll r,ll x){
	if(start>r||end<l) return 0;
	if(start>=l&&end<=r) return seg[node][x];
	ll mid=start+(end-start)/2;
	return qry(node*2+1,start,mid,l,r,x)+qry(node*2+2,mid+1,end,l,r,x);
}

void Solve(){
	ll n,k,q,r1,r2,ans=0,super;cin>>n>>k>>q;

	cin>>hd[1];
	same[hd[1]].pb(1);

	for(ll i=2;i<=n;++i){
		cin>>super>>hd[i];
		adj[i].insert(super);
		adj[super].insert(i);
		same[hd[i]].pb(i);
	}

	dfs();
	build(0,0,tin);

	while(q--){
		cin>>r1>>r2;
		ans=0;
		for(auto it:same[hd[r1]]){
			ans+=qry(0,0,tin,st[it],en[it],r2);
		}
		answer(ans);
	}
}

void testing(){
	#ifndef ONLINE_JUDGE
    freopen("input.in","r",stdin);
    freopen("output.out","w",stdout);
    #endif
}

signed main() {


    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    
    Solve();
}

Compilation message

regions.cpp: In function 'void testing()':
regions.cpp:79:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     freopen("input.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
regions.cpp:80:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |     freopen("output.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 48472 KB Output isn't correct
2 Incorrect 19 ms 48472 KB Output isn't correct
3 Incorrect 20 ms 48656 KB Output isn't correct
4 Incorrect 23 ms 48720 KB Output isn't correct
5 Incorrect 30 ms 49496 KB Output isn't correct
6 Incorrect 39 ms 50512 KB Output isn't correct
7 Incorrect 61 ms 53676 KB Output isn't correct
8 Incorrect 88 ms 55680 KB Output isn't correct
9 Incorrect 177 ms 67008 KB Output isn't correct
10 Incorrect 309 ms 87780 KB Output isn't correct
11 Runtime error 994 ms 131072 KB Execution killed with signal 9
12 Runtime error 893 ms 131072 KB Execution killed with signal 9
13 Runtime error 519 ms 131072 KB Execution killed with signal 9
14 Runtime error 561 ms 131072 KB Execution killed with signal 9
15 Runtime error 571 ms 131072 KB Execution killed with signal 9

Subtask #2
0 / 85.0

# Verdict Execution time Memory Grader output
1 Runtime error 397 ms 131072 KB Execution killed with signal 9
2 Runtime error 339 ms 131072 KB Execution killed with signal 9
3 Runtime error 265 ms 131072 KB Execution killed with signal 9
4 Runtime error 549 ms 131072 KB Execution killed with signal 9
5 Runtime error 540 ms 131072 KB Execution killed with signal 9
6 Runtime error 460 ms 131072 KB Execution killed with signal 9
7 Runtime error 258 ms 131072 KB Execution killed with signal 9
8 Runtime error 155 ms 131072 KB Execution killed with signal 9
9 Runtime error 189 ms 131072 KB Execution killed with signal 9
10 Runtime error 194 ms 131072 KB Execution killed with signal 9
11 Runtime error 219 ms 131072 KB Execution killed with signal 9
12 Runtime error 231 ms 131072 KB Execution killed with signal 9
13 Runtime error 202 ms 131072 KB Execution killed with signal 9
14 Runtime error 201 ms 131072 KB Execution killed with signal 9
15 Runtime error 192 ms 131072 KB Execution killed with signal 9
16 Runtime error 171 ms 131072 KB Execution killed with signal 9
17 Runtime error 178 ms 131072 KB Execution killed with signal 9