oj.uz

Submission #16389

# Submission time Handle Problem Language Result Execution time Memory
16389 2015-08-22T04:59:25 Z comet Parachute rings (IOI12_rings) C++
20 / 100
 2682 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;
vector<int> p[5];
mat path[5];

void init(int n,int k){
	p[k].resize(n);
	path[k].assign(n,vec());
	for(int i=0;i<n;i++)p[k][i]=i;
}

int find(int x,int k){
	if(p[k][x]==x)return x;
	return p[k][x]=find(p[k][x],k);
}

bool merge(int x,int y,int k){
	x=find(x,k),y=find(y,k);
	if(x==y)return 0;
	p[k][x]=y;
	return 1;
}

void finish(int k){
	p[k].clear();
	path[k].clear();
}

bool CircleChk[1000000],chk[4];
int cnt,Ex[4];

void Init(int n){
	N=n;
	init(n,4);
}

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<path[4][v].size();i++){
          	int u=path[4][v][i];
			if(!CircleChk[u]){
				Q.push(u);
				CircleChk[u]=1;
			}
		}
	}
}

void make_graph(int x,int k){
	init(N,k);
	Ex[k]=x;
	for(int i=0;i<N;i++){
		if(x==i)continue;
		for(int t=0;t<path[4][i].size();t++){
			int j=path[4][i][t];
			if(j==x)continue;
			path[k][i].pb(j);
			merge(i,j,k);
		}
		if(path[k][i].size()>2){
			chk[k]=1;
			return;
		}
	}
}

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

	// Base
	if(mode==0){
		path[4][x].pb(y);
		path[4][y].pb(x);
		if(path[4][x].size()<path[4][y].size())swap(x,y);
		if(path[4][x].size()>2){
			mode=2;
			for(int i=0;i<3;i++)
				make_graph(path[4][x][i],i);
			make_graph(x,3);
			finish(4);
			return;
		}

		if(!merge(x,y,4)){
			cnt=0;
			mode=1;
			CircleBfs(x);
		}
	}


	// Circle
	else if(mode==1){
		path[4][x].pb(y);
		path[4][y].pb(x);
		if(!merge(x,y,4)){
			mode=-1;
			return;
		}
		if(path[4][x].size()<path[4][y].size())swap(x,y);
		if(path[4][x].size()>2){
			if(CircleChk[x]==0&&CircleChk[y]==0){
				mode=-1;
				return;
			}
			mode=2;
			for(int i=0;i<path[4][x].size();i++){
				if(!CircleChk[path[4][x][i]]){
					chk[i]=1;
					continue;
				}
				make_graph(path[4][x][i],i);
			}
			make_graph(x,3);
			finish(4);
			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;
			path[k][x].pb(y);
			path[k][y].pb(x);
			if(!merge(x,y,k))chk[k]=1;
			if(path[k][x].size()<path[k][y].size())swap(x,y);
			if(path[k][x].size()>2){
				chk[k]=1;
			}
		}
	}
}

Compilation message

rings.cpp: In function 'void CircleBfs(int)':
rings.cpp:77:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<path[4][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<path[4][i].size();t++){
               ~^~~~~~~~~~~~~~~~~~
rings.cpp: In function 'void Link(int, int)':
rings.cpp:146:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<path[4][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 1396 KB Output is correct
3 Correct 5 ms 1396 KB Output is correct
4 Correct 2 ms 1396 KB Output is correct
5 Correct 3 ms 1396 KB Output is correct
6 Correct 5 ms 1396 KB Output is correct
7 Correct 3 ms 1396 KB Output is correct
8 Correct 4 ms 1396 KB Output is correct
9 Correct 8 ms 1772 KB Output is correct
10 Correct 8 ms 1872 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 426 ms 31212 KB Output is correct
2 Correct 1649 ms 180740 KB Output is correct
3 Correct 462 ms 180740 KB Output is correct
4 Correct 1219 ms 180740 KB Output is correct
5 Correct 1205 ms 180740 KB Output is correct
6 Correct 1247 ms 180740 KB Output is correct
7 Correct 457 ms 180740 KB Output is correct
8 Correct 2682 ms 260368 KB Output is correct
9 Runtime error 1854 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
10 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 1396 KB Output is correct
3 Correct 5 ms 1396 KB Output is correct
4 Correct 2 ms 1396 KB Output is correct
5 Correct 3 ms 1396 KB Output is correct
6 Correct 5 ms 1396 KB Output is correct
7 Correct 3 ms 1396 KB Output is correct
8 Correct 4 ms 1396 KB Output is correct
9 Correct 8 ms 1772 KB Output is correct
10 Correct 8 ms 1872 KB Output is correct
11 Runtime error 9 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 1396 KB Output is correct
3 Correct 5 ms 1396 KB Output is correct
4 Correct 2 ms 1396 KB Output is correct
5 Correct 3 ms 1396 KB Output is correct
6 Correct 5 ms 1396 KB Output is correct
7 Correct 3 ms 1396 KB Output is correct
8 Correct 4 ms 1396 KB Output is correct
9 Correct 8 ms 1772 KB Output is correct
10 Correct 8 ms 1872 KB Output is correct
11 Runtime error 9 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 1396 KB Output is correct
3 Correct 5 ms 1396 KB Output is correct
4 Correct 2 ms 1396 KB Output is correct
5 Correct 3 ms 1396 KB Output is correct
6 Correct 5 ms 1396 KB Output is correct
7 Correct 3 ms 1396 KB Output is correct
8 Correct 4 ms 1396 KB Output is correct
9 Correct 8 ms 1772 KB Output is correct
10 Correct 8 ms 1872 KB Output is correct
11 Correct 426 ms 31212 KB Output is correct
12 Correct 1649 ms 180740 KB Output is correct
13 Correct 462 ms 180740 KB Output is correct
14 Correct 1219 ms 180740 KB Output is correct
15 Correct 1205 ms 180740 KB Output is correct
16 Correct 1247 ms 180740 KB Output is correct
17 Correct 457 ms 180740 KB Output is correct
18 Correct 2682 ms 260368 KB Output is correct
19 Runtime error 1854 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
20 Halted 0 ms 0 KB -