oj.uz

Submission #16386

# Submission time Handle Problem Language Result Execution time Memory
16386 2015-08-22T04:32:42 Z comet Parachute rings (IOI12_rings) C++
20 / 100
 1868 ms 263168 KB 
#include<cstdio>
#include<algorithm>
#include<vector>
#include<queue>
#define pb push_back
using namespace std;
typedef vector<int> vec;
typedef vector<vec> mat;
int N,mode;
struct graph{
	vector<int> p,r;
	mat path;
	void init(int n){
		p.resize(n);
		r.resize(n,0);
		path.assign(n,vec());
		for(int i=0;i<n;i++)p[i]=i;
	}
	int find(int x){
		if(p[x]==x)return x;
		return p[x]=find(p[x]);
	}
	bool merge(int x,int y){
		x=find(x),y=find(y);
		if(x==y)return 0;
		if(r[x]>r[y])swap(x,y);
		p[x]=y;
		if(r[x]==r[y])r[y]++;
		return 1;
	}
	void finish(){
      	p.clear(),r.clear();
		path.clear();
	}
}A,z[4];
bool CircleChk[1000000],chk[4];
int cnt,Ex[4];

void Init(int n){
	N=n;
	A.init(n);
	for(int i=0;i<4;i++)z[i].init(n);
}

int CountCritical(){
	// Base
	if(mode==0){
		return N;
	}

	// Circle
	else if(mode==1){
		return cnt;
	}

	// Divided
	else if(mode==2){
		cnt=0;
		for(int k=0;k<4;k++)if(!chk[k])cnt++;
		if(cnt==0)mode=-1;
		return cnt;
	}

	// End
	else{
		return 0;
	}
}

void CircleBfs(int v){
	queue<int> Q;
	Q.push(v);
	CircleChk[v]=1;
	while(!Q.empty()){
		v=Q.front();
		cnt++;
		Q.pop();
		for(int i=0;i<A.path[v].size();i++){
          	int u=A.path[v][i];
			if(!CircleChk[u]){
				Q.push(u);
				CircleChk[u]=1;
			}
		}
	}
}

void make_graph(int x,int k){
	Ex[k]=x;
	for(int i=0;i<N;i++){
		if(x==i)continue;
		for(int t=0;t<A.path[i].size();t++){
          	int j=A.path[i][t];
			if(j==x)continue;
			z[k].path[i].pb(j);
			z[k].merge(i,j);
		}
		if(z[k].path[i].size()>2){
			chk[k]=1;
			return;
		}
	}
}

void Link(int x,int y){
	//End
	if(mode<0)return;

	// Base
	if(mode==0){
		A.path[x].pb(y);
		A.path[y].pb(x);
		if(A.path[x].size()<A.path[y].size())swap(x,y);
		if(A.path[x].size()>2){
			mode=2;
			for(int i=0;i<A.path[x].size();i++)
				make_graph(A.path[x][i],i);
			make_graph(x,3);
			A.finish();
			return;
		}

		if(!A.merge(x,y)){
			cnt=0;
			mode=1;
			CircleBfs(x);
		}
	}


	// Circle
	else if(mode==1){
		A.path[x].pb(y);
		A.path[y].pb(x);
		if(!A.merge(x,y)){
			mode=-1;
			return;
		}
		if(A.path[x].size()<A.path[y].size())swap(x,y);
		if(A.path[x].size()>2){
			if(CircleChk[x]==0&&CircleChk[y]==0){
				mode=-1;
				return;
			}
			mode=2;
			for(int i=0;i<A.path[x].size();i++){
				if(!CircleChk[A.path[x][i]]){
					chk[i]=1;
					continue;
				}
				make_graph(A.path[x][i],i);
			}
			make_graph(x,3);
			A.finish();
			return;
		}
	}

	// Divided
	else if(mode==2){
		for(int k=0;k<4;k++){
			if(chk[k])continue;
			if(Ex[k]==x||Ex[k]==y)continue;
			z[k].path[x].pb(y);
			z[k].path[y].pb(x);
			if(!z[k].merge(x,y))chk[k]=1;
			if(z[k].path[x].size()<z[k].path[y].size())swap(x,y);
			if(z[k].path[x].size()>2)chk[k]=1;
		}
	}
}

Compilation message

rings.cpp: In function 'void CircleBfs(int)':
rings.cpp:78:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<A.path[v].size();i++){
               ~^~~~~~~~~~~~~~~~~
rings.cpp: In function 'void make_graph(int, int)':
rings.cpp:92:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int t=0;t<A.path[i].size();t++){
               ~^~~~~~~~~~~~~~~~~
rings.cpp: In function 'void Link(int, int)':
rings.cpp:116:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<A.path[x].size();i++)
                ~^~~~~~~~~~~~~~~~~
rings.cpp:146:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<A.path[x].size();i++){
                ~^~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 7 ms 1652 KB Output is correct
3 Correct 6 ms 1652 KB Output is correct
4 Correct 2 ms 1652 KB Output is correct
5 Correct 4 ms 1652 KB Output is correct
6 Correct 6 ms 1652 KB Output is correct
7 Correct 3 ms 1652 KB Output is correct
8 Correct 4 ms 1652 KB Output is correct
9 Correct 8 ms 1800 KB Output is correct
10 Correct 9 ms 1964 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 525 ms 98304 KB Output is correct
2 Correct 1663 ms 196352 KB Output is correct
3 Correct 502 ms 196352 KB Output is correct
4 Correct 1365 ms 196352 KB Output is correct
5 Correct 1407 ms 196352 KB Output is correct
6 Correct 1606 ms 196352 KB Output is correct
7 Correct 491 ms 196352 KB Output is correct
8 Runtime error 1868 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
9 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 7 ms 1652 KB Output is correct
3 Correct 6 ms 1652 KB Output is correct
4 Correct 2 ms 1652 KB Output is correct
5 Correct 4 ms 1652 KB Output is correct
6 Correct 6 ms 1652 KB Output is correct
7 Correct 3 ms 1652 KB Output is correct
8 Correct 4 ms 1652 KB Output is correct
9 Correct 8 ms 1800 KB Output is correct
10 Correct 9 ms 1964 KB Output is correct
11 Runtime error 8 ms 263168 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
12 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 7 ms 1652 KB Output is correct
3 Correct 6 ms 1652 KB Output is correct
4 Correct 2 ms 1652 KB Output is correct
5 Correct 4 ms 1652 KB Output is correct
6 Correct 6 ms 1652 KB Output is correct
7 Correct 3 ms 1652 KB Output is correct
8 Correct 4 ms 1652 KB Output is correct
9 Correct 8 ms 1800 KB Output is correct
10 Correct 9 ms 1964 KB Output is correct
11 Runtime error 8 ms 263168 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
12 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 7 ms 1652 KB Output is correct
3 Correct 6 ms 1652 KB Output is correct
4 Correct 2 ms 1652 KB Output is correct
5 Correct 4 ms 1652 KB Output is correct
6 Correct 6 ms 1652 KB Output is correct
7 Correct 3 ms 1652 KB Output is correct
8 Correct 4 ms 1652 KB Output is correct
9 Correct 8 ms 1800 KB Output is correct
10 Correct 9 ms 1964 KB Output is correct
11 Correct 525 ms 98304 KB Output is correct
12 Correct 1663 ms 196352 KB Output is correct
13 Correct 502 ms 196352 KB Output is correct
14 Correct 1365 ms 196352 KB Output is correct
15 Correct 1407 ms 196352 KB Output is correct
16 Correct 1606 ms 196352 KB Output is correct
17 Correct 491 ms 196352 KB Output is correct
18 Runtime error 1868 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
19 Halted 0 ms 0 KB -