oj.uz

Submission #16380

# Submission time Handle Problem Language Result Execution time Memory
16380 2015-08-22T04:18:43 Z comet Parachute rings (IOI12_rings) C++
20 / 100
 1790 ms 263168 KB 
#include<iostream>
#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;
	mat path;
	graph(){}
	void init(int n){
		p.resize(n);
		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;
		p[x]=y;
		return 1;
	}
}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){
	// 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);
			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);
			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;
		}
	}

	// End
	else{
		return;
	}
}

Compilation message

rings.cpp: In function 'void CircleBfs(int)':
rings.cpp:73:16: 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:87:16: 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:108:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<A.path[x].size();i++)
                ~^~~~~~~~~~~~~~~~~
rings.cpp:137:17: 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 3 ms 376 KB Output is correct
2 Correct 7 ms 1608 KB Output is correct
3 Correct 6 ms 1608 KB Output is correct
4 Correct 3 ms 1608 KB Output is correct
5 Correct 4 ms 1608 KB Output is correct
6 Correct 5 ms 1608 KB Output is correct
7 Correct 3 ms 1608 KB Output is correct
8 Correct 4 ms 1608 KB Output is correct
9 Correct 8 ms 1784 KB Output is correct
10 Correct 12 ms 1824 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 478 ms 87984 KB Output is correct
2 Correct 1493 ms 194376 KB Output is correct
3 Correct 467 ms 194376 KB Output is correct
4 Correct 1313 ms 194376 KB Output is correct
5 Correct 1261 ms 194376 KB Output is correct
6 Correct 1325 ms 194376 KB Output is correct
7 Correct 452 ms 194376 KB Output is correct
8 Runtime error 1790 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 3 ms 376 KB Output is correct
2 Correct 7 ms 1608 KB Output is correct
3 Correct 6 ms 1608 KB Output is correct
4 Correct 3 ms 1608 KB Output is correct
5 Correct 4 ms 1608 KB Output is correct
6 Correct 5 ms 1608 KB Output is correct
7 Correct 3 ms 1608 KB Output is correct
8 Correct 4 ms 1608 KB Output is correct
9 Correct 8 ms 1784 KB Output is correct
10 Correct 12 ms 1824 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 3 ms 376 KB Output is correct
2 Correct 7 ms 1608 KB Output is correct
3 Correct 6 ms 1608 KB Output is correct
4 Correct 3 ms 1608 KB Output is correct
5 Correct 4 ms 1608 KB Output is correct
6 Correct 5 ms 1608 KB Output is correct
7 Correct 3 ms 1608 KB Output is correct
8 Correct 4 ms 1608 KB Output is correct
9 Correct 8 ms 1784 KB Output is correct
10 Correct 12 ms 1824 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 3 ms 376 KB Output is correct
2 Correct 7 ms 1608 KB Output is correct
3 Correct 6 ms 1608 KB Output is correct
4 Correct 3 ms 1608 KB Output is correct
5 Correct 4 ms 1608 KB Output is correct
6 Correct 5 ms 1608 KB Output is correct
7 Correct 3 ms 1608 KB Output is correct
8 Correct 4 ms 1608 KB Output is correct
9 Correct 8 ms 1784 KB Output is correct
10 Correct 12 ms 1824 KB Output is correct
11 Correct 478 ms 87984 KB Output is correct
12 Correct 1493 ms 194376 KB Output is correct
13 Correct 467 ms 194376 KB Output is correct
14 Correct 1313 ms 194376 KB Output is correct
15 Correct 1261 ms 194376 KB Output is correct
16 Correct 1325 ms 194376 KB Output is correct
17 Correct 452 ms 194376 KB Output is correct
18 Runtime error 1790 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
19 Halted 0 ms 0 KB -