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Submission #283994

# Submission time Handle Problem Language Result Execution time Memory
283994 2020-08-26T10:51:07 Z Nodir_Bobiev Split the Attractions (IOI19_split) C++17
18 / 100
 125 ms 10232 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 100;
bool sub1 = true, sub2 = true, sub3 = true, sub4 = true;
int n, m, A, B, C, sz[N];
vector < int > ans;
vector < int > gr[N];
vector < pair < int, int > >cl;

vector < int > Subtask1(){
	vector < int > ans(n,0);
	int fath = -1, start = 0;
	for( int i = 0; i < n; i ++ ){
		if( gr[i].size() == 1 )start = i;
	}
	while( A + B + C > 0 ){
		if( A > 0 ){
			ans[start] = 1;
			A--;
		}else if( B > 0 ){
			ans[start] = 2;
			B --;
		}else{
			ans[start] = 3;
			C --;
		}
		if( gr[start][0] != fath ){
			fath = start;
			start = gr[start][0];
		}else if( gr[start].size() > 1 ){
			fath = start;
			start = gr[start][1];
		}
	}return ans;
}
vector < int > Subtask2(){
	vector < int > ans(n, 3);
	queue < int > q;
	q.push(0); ans[0] = 2;B--;
	while(!q.empty() && B > 0){
		int v = q.front();q.pop();
		for( auto to: gr[v] ){
			if( B > 0 && ans[to] == 3 ){
				q.push(to); ans[to] = 2; B--;
			}
		}
	}for( int i = 0; i < n; i ++ )if( ans[i] == 3 ){ans[i]=1;break;}
	return ans;	
}
void build( int v, int f ){
	sz[v] = 1;
	for( auto to: gr[v] ){
		if( to != f ){
			build(to, v);
			sz[v] += sz[to];
		}
	}
}
void fil( int v, int f, int x ){
	if( cl[x].first == 0 ) return;
	ans[v] = cl[x].second;
	cl[x].first --;
	for( auto to: gr[v] ){
		if( to != f ) fil(to, v, x);
	}
}
bool dfs( int v, int f ){
	vector < pair < int, int > >children;
	for( auto to: gr[v] ){
		children.push_back({sz[to], to});
	}
	sort(children.begin(),children.end());
	for( size_t i = 0; i < children.size(); i ++ ){
		if( children[i].first >= cl[0].first && sz[v] - children[i].first >= cl[1].first ){
			fil(children[i].second, v, 0);
			ans[v] = cl[1].second; cl[1].first--;
			for( size_t j = 0; j < i; j ++ )fil(children[j].second, v, 1);
			for( size_t j = i+1; j < children.size(); j ++ )fil(children[j].second, v, 1);
			return true;
		}
	}
	for( auto to: gr[v] ){
		if( to != f ){
			sz[v] -= sz[to]; sz[to] += sz[v];
			if( dfs(to,v) ) return true;
		}
	}
	return false;
}
vector < int > Subtask3(){
	cl.push_back({A,1}); cl.push_back({B,2}); cl.push_back({C,3});
	sort(cl.begin(), cl.end());
	ans.resize(n); build(0, -1);
	if( dfs(0,-1) ){
		for( int i = 0; i < n; i ++ )if( !ans[i] ) ans[i] = cl[2].second;
	}return ans;
}
vector < int > Subtask4(){
	return {};
}

vector<int> find_split(int nn, int aa, int bb, int cc, vector<int> pp, vector<int> qq) {
	n = nn; m = pp.size(); A = aa; B = bb; C = cc;
	if( m >= n )sub3 = false;
	if( n > 2500 || m > 5000 ) sub4 = false;
	if( A > 1 ) sub2 = false;

	for( int i = 0; i < m; i ++ ){
		gr[pp[i]].push_back(qq[i]);
		gr[qq[i]].push_back(pp[i]);
	}
	for( int i = 0; i < n; i ++ ){
		if( gr[i].size() > 2 )sub1 = false;
	}
	if( sub1 ){
		return Subtask1();
	}
	if( sub2 ){
		return Subtask2();
	}
	if( sub3 ){
		return Subtask3();
	}
	if( sub4 ){
		return Subtask4();
	}
	return {};
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2688 KB ok, correct split
2 Correct 2 ms 2816 KB ok, correct split
3 Correct 2 ms 2688 KB ok, correct split
4 Correct 2 ms 2688 KB ok, correct split
5 Correct 2 ms 2688 KB ok, correct split
6 Correct 2 ms 2688 KB ok, correct split
7 Correct 87 ms 7800 KB ok, correct split
8 Correct 97 ms 7800 KB ok, correct split
9 Correct 90 ms 7800 KB ok, correct split
10 Correct 80 ms 7732 KB ok, correct split
11 Correct 90 ms 7800 KB ok, correct split

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB ok, correct split
2 Correct 2 ms 2688 KB ok, correct split
3 Correct 2 ms 2688 KB ok, correct split
4 Correct 108 ms 8952 KB ok, correct split
5 Correct 101 ms 7928 KB ok, correct split
6 Correct 89 ms 7800 KB ok, correct split
7 Correct 80 ms 7800 KB ok, correct split
8 Correct 125 ms 10232 KB ok, correct split
9 Correct 74 ms 7800 KB ok, correct split
10 Correct 55 ms 8364 KB ok, correct split
11 Correct 59 ms 8432 KB ok, correct split
12 Correct 73 ms 8336 KB ok, correct split

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB ok, correct split
2 Incorrect 124 ms 9824 KB jury found a solution, contestant did not
3 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB WA in grader: Invalid length of the result.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2688 KB ok, correct split
2 Correct 2 ms 2816 KB ok, correct split
3 Correct 2 ms 2688 KB ok, correct split
4 Correct 2 ms 2688 KB ok, correct split
5 Correct 2 ms 2688 KB ok, correct split
6 Correct 2 ms 2688 KB ok, correct split
7 Correct 87 ms 7800 KB ok, correct split
8 Correct 97 ms 7800 KB ok, correct split
9 Correct 90 ms 7800 KB ok, correct split
10 Correct 80 ms 7732 KB ok, correct split
11 Correct 90 ms 7800 KB ok, correct split
12 Correct 2 ms 2688 KB ok, correct split
13 Correct 2 ms 2688 KB ok, correct split
14 Correct 2 ms 2688 KB ok, correct split
15 Correct 108 ms 8952 KB ok, correct split
16 Correct 101 ms 7928 KB ok, correct split
17 Correct 89 ms 7800 KB ok, correct split
18 Correct 80 ms 7800 KB ok, correct split
19 Correct 125 ms 10232 KB ok, correct split
20 Correct 74 ms 7800 KB ok, correct split
21 Correct 55 ms 8364 KB ok, correct split
22 Correct 59 ms 8432 KB ok, correct split
23 Correct 73 ms 8336 KB ok, correct split
24 Correct 2 ms 2688 KB ok, correct split
25 Incorrect 124 ms 9824 KB jury found a solution, contestant did not
26 Halted 0 ms 0 KB -