oj.uz

Submission #16388

# Submission time Handle Problem Language Result Execution time Memory
16388 2015-08-22T04:50:32 Z comet Parachute rings (IOI12_rings) C++
20 / 100
 2669 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;
			finish(k);
			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;
				finish(k);
			}
		}
	}
}

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:147:17: 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 6 ms 1432 KB Output is correct
4 Correct 2 ms 1432 KB Output is correct
5 Correct 3 ms 1432 KB Output is correct
6 Correct 5 ms 1432 KB Output is correct
7 Correct 3 ms 1432 KB Output is correct
8 Correct 4 ms 1432 KB Output is correct
9 Correct 8 ms 1684 KB Output is correct
10 Correct 8 ms 1960 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 407 ms 31064 KB Output is correct
2 Correct 1506 ms 179676 KB Output is correct
3 Correct 460 ms 179676 KB Output is correct
4 Correct 1161 ms 179676 KB Output is correct
5 Correct 1141 ms 179676 KB Output is correct
6 Correct 1275 ms 179676 KB Output is correct
7 Correct 460 ms 179676 KB Output is correct
8 Correct 2669 ms 260476 KB Output is correct
9 Runtime error 1858 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 6 ms 1432 KB Output is correct
4 Correct 2 ms 1432 KB Output is correct
5 Correct 3 ms 1432 KB Output is correct
6 Correct 5 ms 1432 KB Output is correct
7 Correct 3 ms 1432 KB Output is correct
8 Correct 4 ms 1432 KB Output is correct
9 Correct 8 ms 1684 KB Output is correct
10 Correct 8 ms 1960 KB Output is correct
11 Runtime error 7 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 6 ms 1432 KB Output is correct
4 Correct 2 ms 1432 KB Output is correct
5 Correct 3 ms 1432 KB Output is correct
6 Correct 5 ms 1432 KB Output is correct
7 Correct 3 ms 1432 KB Output is correct
8 Correct 4 ms 1432 KB Output is correct
9 Correct 8 ms 1684 KB Output is correct
10 Correct 8 ms 1960 KB Output is correct
11 Runtime error 7 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 6 ms 1432 KB Output is correct
4 Correct 2 ms 1432 KB Output is correct
5 Correct 3 ms 1432 KB Output is correct
6 Correct 5 ms 1432 KB Output is correct
7 Correct 3 ms 1432 KB Output is correct
8 Correct 4 ms 1432 KB Output is correct
9 Correct 8 ms 1684 KB Output is correct
10 Correct 8 ms 1960 KB Output is correct
11 Correct 407 ms 31064 KB Output is correct
12 Correct 1506 ms 179676 KB Output is correct
13 Correct 460 ms 179676 KB Output is correct
14 Correct 1161 ms 179676 KB Output is correct
15 Correct 1141 ms 179676 KB Output is correct
16 Correct 1275 ms 179676 KB Output is correct
17 Correct 460 ms 179676 KB Output is correct
18 Correct 2669 ms 260476 KB Output is correct
19 Runtime error 1858 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
20 Halted 0 ms 0 KB -