oj.uz

답안 #2687

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
2687 2013-07-30T15:20:35 Z gs13068 간선 파괴 (GA5_destroy) C++
100 / 100
 2116 ms 7752 KB 
#include<cstdio>
#include<vector>

#define BUCKET_SIZE 351

int s[123456];
int e[123456];

struct edge
{
int s;
int e;
} temp;

std::vector<edge> pre[351];
std::vector<edge> suf[351];
int parent[700];
int height[700];

inline int root(int x)
{
return parent[x]==x?x:parent[x]=root(parent[x]);
}

inline void combine(int a,int b)
{
a=root(a);
b=root(b);
if(a==b)return;
if(height[a]<height[b])parent[a]=b;
else parent[b]=a;
if(height[a]==height[b])height[b]++;
}

int main()
{
int i,j,k,n,m,l,r,q;
scanf("%d%d",&n,&m);
for(i=0;i<m;i++)
{
scanf("%d%d",&s[i],&e[i]);
s[i]--;e[i]--;
}
for(i=0;i<n;i++)
{
parent[i]=i;
height[i]=0;
}
for(i=0;i<m;i++)
{
combine(s[i],e[i]);
if(i%BUCKET_SIZE==BUCKET_SIZE-1)
{
for(j=0;j<n;j++)if(parent[j]!=j)
{
temp.s=j;
temp.e=parent[j];
pre[i/BUCKET_SIZE].push_back(temp);
}
}
}
for(i=0;i<n;i++)
{
parent[i]=i;
height[i]=0;
}
for(i=m-1;i>=0;i--)
{
combine(s[i],e[i]);
if(!(i%BUCKET_SIZE))
{
for(j=0;j<n;j++)if(parent[j]!=j)
{
temp.s=j;
temp.e=parent[j];
suf[i/BUCKET_SIZE].push_back(temp);
}
}
}
scanf("%d",&q);
for(i=0;i<q;i++)
{
scanf("%d%d",&l,&r);
l--;r--;
for(j=0;j<n;j++)
{
parent[j]=j;
height[j]=0;
}
j=l/BUCKET_SIZE-1;
if(j>=0)for(k=0;k<pre[j].size();k++)combine(pre[j][k].s,pre[j][k].e);
for(k=l/BUCKET_SIZE*BUCKET_SIZE;k<l;k++)combine(s[k],e[k]);
j=r/BUCKET_SIZE+1;
for(k=0;k<suf[j].size();k++)combine(suf[j][k].s,suf[j][k].e);
for(k=r+1;k<j*BUCKET_SIZE;k++)combine(s[k],e[k]);
k=0;
for(j=0;j<n;j++)if(parent[j]==j)k++;
printf("%d\n",k);
}
}

Subtask #1
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2196 KB Output is correct
2 Correct 0 ms 2196 KB Output is correct
3 Correct 0 ms 2196 KB Output is correct
4 Correct 0 ms 2196 KB Output is correct
5 Correct 0 ms 2196 KB Output is correct
6 Correct 0 ms 2196 KB Output is correct
7 Correct 0 ms 2196 KB Output is correct
8 Correct 0 ms 2196 KB Output is correct
9 Correct 0 ms 2196 KB Output is correct
10 Correct 0 ms 2196 KB Output is correct
11 Correct 0 ms 2196 KB Output is correct
12 Correct 0 ms 2196 KB Output is correct
13 Correct 0 ms 2196 KB Output is correct
14 Correct 0 ms 2196 KB Output is correct
15 Correct 0 ms 2196 KB Output is correct
16 Correct 0 ms 2196 KB Output is correct
17 Correct 0 ms 2196 KB Output is correct
18 Correct 0 ms 2196 KB Output is correct
19 Correct 0 ms 2196 KB Output is correct
20 Correct 0 ms 2196 KB Output is correct
21 Correct 0 ms 2196 KB Output is correct
22 Correct 0 ms 2196 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 48 ms 2460 KB Output is correct
2 Correct 48 ms 2460 KB Output is correct
3 Correct 52 ms 2460 KB Output is correct
4 Correct 56 ms 3252 KB Output is correct
5 Correct 56 ms 3252 KB Output is correct
6 Correct 436 ms 3252 KB Output is correct
7 Correct 420 ms 3252 KB Output is correct
8 Correct 432 ms 3120 KB Output is correct
9 Correct 56 ms 2196 KB Output is correct
10 Correct 60 ms 2196 KB Output is correct
11 Correct 56 ms 2196 KB Output is correct
12 Correct 56 ms 3252 KB Output is correct
13 Correct 56 ms 3252 KB Output is correct
14 Correct 56 ms 3252 KB Output is correct
15 Correct 40 ms 2196 KB Output is correct
16 Correct 52 ms 2196 KB Output is correct
17 Correct 12 ms 2196 KB Output is correct
18 Correct 8 ms 2196 KB Output is correct
19 Correct 4 ms 2196 KB Output is correct
20 Correct 4 ms 2196 KB Output is correct
21 Correct 4 ms 2196 KB Output is correct
22 Correct 4 ms 2196 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1456 ms 4504 KB Output is correct
2 Correct 1468 ms 4368 KB Output is correct
3 Correct 1444 ms 7752 KB Output is correct
4 Correct 1460 ms 4504 KB Output is correct
5 Correct 1576 ms 3548 KB Output is correct
6 Correct 1344 ms 7752 KB Output is correct
7 Correct 1456 ms 3412 KB Output is correct
8 Correct 1524 ms 3548 KB Output is correct
9 Correct 2100 ms 2328 KB Output is correct
10 Correct 2116 ms 2328 KB Output is correct
11 Correct 1488 ms 3408 KB Output is correct
12 Correct 1336 ms 7752 KB Output is correct
13 Correct 1344 ms 5312 KB Output is correct
14 Correct 1368 ms 5316 KB Output is correct
15 Correct 1704 ms 2196 KB Output is correct
16 Correct 1484 ms 2196 KB Output is correct
17 Correct 512 ms 2196 KB Output is correct
18 Correct 504 ms 2196 KB Output is correct
19 Correct 160 ms 2196 KB Output is correct
20 Correct 164 ms 2196 KB Output is correct
21 Correct 120 ms 2196 KB Output is correct
22 Correct 112 ms 2196 KB Output is correct