| # |
제출 시각 |
아이디 |
문제 |
언어 |
결과 |
실행 시간 |
메모리 |
| 594981 |
2022-07-13T08:26:39 Z |
조영욱(#8439) |
물병 (JOI14_bottle) |
C++14 |
|
4696 ms |
503476 KB |
#include <bits/stdc++.h>
using namespace std;
int n,m,pp,q;
typedef pair<int,int> P;
char arr[2000][2001]; //4
int xp[200000];
int yp[200000];
int s[200000];
int t[200000];
int lo[200000]; //�Ұ���
int hi[200000]; //����
int mid[200000]; //5
int dist[4001][4001]; //64
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};
int p[16200000]; //64
vector<P> vec; //10
int lrx[6]={-1,0,1,1,0,-1};
int lry[6]={-1,-2,-1,1,2,1};
int udx[6]={-1,-2,-1,1,2,1};
int udy[6]={1,0,-1,-1,0,1};
int ret[200000]; //1
typedef pair<P,int> Pi;
Pi edge[8000000]; //96
int big=4000000;
int st[4000000]; //16
int ss=0;
int f=0;
int ind[4000000]; //16
int chk=0;
P que[16200000]; //128
int qs=0;
int qe=-1;
const int siz=(1<<22);
int seg[siz*2]; //32
int sum(int l,int r,int node=1,int nodel=0,int noder=siz-1) {
if (r<nodel||l>noder) {
return 0;
}
if (l<=nodel&&noder<=r) {
return seg[node];
}
int mid=(nodel+noder)/2;
return max(sum(l,r,node*2,nodel,mid),sum(l,r,node*2+1,mid+1,noder));
}
void update(int i,int val) {
i+=siz;
seg[i]=val;
while (i>1) {
i/=2;
seg[i]=max(seg[i*2],seg[i*2+1]);
}
}
void dfs_sz(int v,int prev) {
p[v+big]=prev;
seg[v]=1;
for(int i=st[v];i<chk;i++) {
if (edge[i].first.first!=v) {
break;
}
int nt=edge[i].first.second;
if (nt==prev) {
continue;
}
p[nt]=edge[i].second;
que[ss++]=P(v,nt);
dfs_sz(nt,v);
seg[v]+=seg[nt];
}
}
void dfs_hld(int v) {
ind[v]=f++;
update(ind[v],p[v]);
if (st[v]==-1) {
return;
}
for(int i=st[v];i<ss;i++) {
if (que[i].first!=v) {
break;
}
int nt=que[i].second;
if (i==st[v]) {
p[nt+big*2]=p[v+big*2];
dfs_hld(nt);
}
else {
p[nt+big*2]=nt;
dfs_hld(nt);
}
}
}
int query(int u,int v) {
int cnt=0;
int ret=0;
while (1) {
if (p[u+big*2]==p[v+big*2]) {
break;
}
if (ind[p[u+big*2]]>ind[p[v+big*2]]) {
ret=max(ret,sum(ind[p[u+big*2]],ind[u]));
u=p[p[u+big*2]+big];
}
else {
ret=max(ret,sum(ind[p[v+big*2]],ind[v]));
v=p[p[v+big*2]+big];
}
}
if (ind[u]<ind[v]) {
swap(u,v);
}
ret=max(ret,sum(ind[v]+1,ind[u]));
return ret;
}
bool valid(int x,int y) {
return x>=0&&x<n&&y>=0&&y<m&&arr[x][y]!='#';
}
bool valid1(int x,int y) {
return x>=0&&x<=2*n&&y>=0&&y<=2*m;
}
int find(int a) {
return p[a]<0?a:p[a]=find(p[a]);
}
void merge(int a,int b) {
a=find(a);
b=find(b);
if (a==b) {
return;
}
p[b]=a;
}
int main(void) {
scanf("%d %d %d %d",&n,&m,&pp,&q);
for(int i=0;i<n;i++) {
scanf("%s",arr[i]);
}
for(int i=0;i<pp;i++) {
scanf("%d %d",&xp[i],&yp[i]);
xp[i]--;
yp[i]--;
}
for(int i=0;i<q;i++) {
scanf("%d %d",&s[i],&t[i]);
s[i]--;
t[i]--;
}
for(int i=0;i<q;i++) {
lo[i]=0;
hi[i]=((n*m)/2+1)*2;
}
//int chk=0;
if (true) {
bool flag=true;
int cnt=0;
memset(dist,-1,sizeof(dist));
for(int i=0;i<n*m;i++) {
p[i]=-1;
}
for(int i=0;i<pp;i++) {
que[++qe]=P(xp[i],yp[i]);
//vis[xp[i]][yp[i]]=true;
dist[xp[i]][yp[i]]=0;
}
for(int i=1;i<n*m;i++) {
while (qs<=qe) {
P now=que[qs];
if (dist[now.first][now.second]>=i) {
break;
}
qs++;
int x=now.first;
int y=now.second;
for(int j=0;j<4;j++) {
if (valid(x+dx[j],y+dy[j])) {
int nt=(x+dx[j])*m+y+dy[j];
if (find(x*m+y)!=find(nt)) {
edge[chk++]=Pi(P(x*m+y,nt),i);
edge[chk++]=Pi(P(nt,x*m+y),i);
merge(x*m+y,nt);
}
if (dist[x+dx[j]][y+dy[j]]==-1) {
que[++qe]=P(x+dx[j],y+dy[j]);
dist[x+dx[j]][y+dy[j]]=dist[x][y]+1;
}
}
}
}
}
qs=0;
qe=-1;
for(int i=0;i+1<n*m;i++) {
if (find(i)!=find(i+1)) {
edge[chk++]=Pi(P(i,i+1),((n*m)/2+1));
edge[chk++]=Pi(P(i+1,i),((n*m)/2+1));
merge(i,i+1);
}
}
sort(edge,edge+chk);
memset(st,-1,sizeof(st));
for(int i=chk-1;i>=0;i--) {
st[edge[i].first.first]=i;
}
dfs_sz(0,-1);
p[big*2]=0;
sort(que,que+ss);
memset(st,-1,sizeof(st));
for(int i=ss-1;i>=0;i--) {
st[que[i].first]=i;
}
for(int i=0;i<n*m;i++) {
if (st[i]==-1) {
continue;
}
for(int j=st[i];j<ss;j++) {
if (que[j].first!=i) {
break;
}
int pr=st[i];
if (seg[que[pr].second]<seg[que[j].second]) {
swap(que[pr],que[j]);
}
}
}
memset(seg,0,sizeof(seg));
dfs_hld(0);
for(int i=0;i<q;i++) {
int one=s[i];
int two=t[i];
int got=query(xp[one]*m+yp[one],xp[two]*m+yp[two]);
lo[i]=2*got-2;
hi[i]=2*got;
}
}
memset(dist,-1,sizeof(dist));
memset(p,-1,sizeof(p));
int cnt=0;
for(int i=0;i<q;i++) {
//printf("%d %d\n",lo[i],hi[i]);
if (hi[i]==((n*m)/2+1)*2) {
ret[i]=0;
continue;
}
vec.push_back(P((lo[i]+1)/2,i));
cnt++;
}
sort(vec.begin(),vec.end());
int len=2*m+1;
for(int i=0;i<pp;i++) {
for(int j=0;j<4;j++) {
int nx=2*xp[i]+1+dx[j];
int ny=2*yp[i]+1+dy[j];
merge((2*xp[i]+1)*len+(2*yp[i]+1),nx*len+ny);
if (dist[nx][ny]==-1) {
que[++qe]=P(nx,ny);
dist[nx][ny]=0;
}
}
}
int idx=0;
for(int i=0;cnt;i++) {
while (idx<vec.size()&&vec[idx].first==i) {
int one=s[vec[idx].second];
int two=t[vec[idx].second];
cnt--;
if (find((2*xp[one]+1)*len+(2*yp[one]+1))==find((2*xp[two]+1)*len+(2*yp[two]+1))) {
ret[vec[idx].second]=2*i+1;
}
else {
ret[vec[idx].second]=2*i+2;
}
idx++;
}
if (cnt==0) {
break;
}
//printf("%d\n",i);
while (qs<=qe) {
P now=que[qs];
if (dist[now.first][now.second]>i) {
break;
}
qs++;
int x=now.first;
int y=now.second;
if (x%2==1) {
for(int j=0;j<6;j++) {
if (valid1(x+lrx[j],y+lry[j])) {
int nx=x+lrx[j];
int ny=y+lry[j];
if (j<3) {
if (arr[x/2][y/2-1]!='#') {
//printf("%d %d %d %d\n",x,y,nx,ny);
merge(x*len+y,nx*len+ny);
if (dist[nx][ny]==-1) {
que[++qe]=P(nx,ny);
dist[nx][ny]=dist[x][y]+1;
}
}
}
else {
if (arr[x/2][y/2]!='#') {
//printf("%d %d %d %d\n",x,y,nx,ny);
merge(x*len+y,nx*len+ny);
if (dist[nx][ny]==-1) {
que[++qe]=P(nx,ny);
dist[nx][ny]=dist[x][y]+1;
}
}
}
}
}
}
else {
for(int j=0;j<6;j++) {
if (valid1(x+udx[j],y+udy[j])) {
int nx=x+udx[j];
int ny=y+udy[j];
if (j<3) {
if (arr[x/2-1][y/2]!='#') {
//printf("%d %d %d %d\n",x,y,nx,ny);
merge(x*len+y,nx*len+ny);
if (dist[nx][ny]==-1) {
que[++qe]=P(nx,ny);
dist[nx][ny]=dist[x][y]+1;
}
}
}
else {
if (arr[x/2][y/2]!='#') {
//printf("%d %d %d %d\n",x,y,nx,ny);
merge(x*len+y,nx*len+ny);
if (dist[nx][ny]==-1) {
que[++qe]=P(nx,ny);
dist[nx][ny]=dist[x][y]+1;
}
}
}
}
}
}
}
}
for(int i=0;i<q;i++) {
printf("%d\n",ret[i]-1);
}
}
Compilation message
bottle.cpp: In function 'int query(int, int)':
bottle.cpp:101:5: warning: unused variable 'cnt' [-Wunused-variable]
101 | int cnt=0;
| ^~~
bottle.cpp: In function 'int main()':
bottle.cpp:164:14: warning: unused variable 'flag' [-Wunused-variable]
164 | bool flag=true;
| ^~~~
bottle.cpp:165:13: warning: unused variable 'cnt' [-Wunused-variable]
165 | int cnt=0;
| ^~~
bottle.cpp:272:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
272 | while (idx<vec.size()&&vec[idx].first==i) {
| ~~~^~~~~~~~~~~
bottle.cpp:144:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
144 | scanf("%d %d %d %d",&n,&m,&pp,&q);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bottle.cpp:146:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
146 | scanf("%s",arr[i]);
| ~~~~~^~~~~~~~~~~~~
bottle.cpp:149:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
149 | scanf("%d %d",&xp[i],&yp[i]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bottle.cpp:154:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
154 | scanf("%d %d",&s[i],&t[i]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
80 ms |
175528 KB |
Output is correct |
| 2 |
Correct |
93 ms |
176032 KB |
Output is correct |
| 3 |
Correct |
94 ms |
176944 KB |
Output is correct |
| 4 |
Correct |
347 ms |
183052 KB |
Output is correct |
| 5 |
Correct |
313 ms |
183096 KB |
Output is correct |
| 6 |
Correct |
361 ms |
182828 KB |
Output is correct |
| 7 |
Correct |
333 ms |
183480 KB |
Output is correct |
| 8 |
Correct |
309 ms |
184144 KB |
Output is correct |
| 9 |
Correct |
224 ms |
184696 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
189 ms |
187292 KB |
Output is correct |
| 2 |
Correct |
302 ms |
191320 KB |
Output is correct |
| 3 |
Correct |
2511 ms |
328008 KB |
Output is correct |
| 4 |
Correct |
2681 ms |
326048 KB |
Output is correct |
| 5 |
Correct |
2739 ms |
333272 KB |
Output is correct |
| 6 |
Correct |
1821 ms |
320716 KB |
Output is correct |
| 7 |
Correct |
2575 ms |
323988 KB |
Output is correct |
| 8 |
Correct |
2756 ms |
333480 KB |
Output is correct |
| 9 |
Correct |
2780 ms |
334840 KB |
Output is correct |
| 10 |
Correct |
2558 ms |
330364 KB |
Output is correct |
| 11 |
Correct |
2523 ms |
327164 KB |
Output is correct |
| 12 |
Correct |
1489 ms |
462688 KB |
Output is correct |
| 13 |
Correct |
2520 ms |
481820 KB |
Output is correct |
| 14 |
Correct |
1804 ms |
482148 KB |
Output is correct |
| 15 |
Correct |
2292 ms |
481956 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
181 ms |
187396 KB |
Output is correct |
| 2 |
Correct |
295 ms |
191780 KB |
Output is correct |
| 3 |
Correct |
2252 ms |
327528 KB |
Output is correct |
| 4 |
Correct |
3004 ms |
340708 KB |
Output is correct |
| 5 |
Correct |
3044 ms |
347124 KB |
Output is correct |
| 6 |
Correct |
3108 ms |
346472 KB |
Output is correct |
| 7 |
Correct |
2812 ms |
345200 KB |
Output is correct |
| 8 |
Correct |
2986 ms |
348464 KB |
Output is correct |
| 9 |
Correct |
1848 ms |
482624 KB |
Output is correct |
| 10 |
Correct |
2266 ms |
482520 KB |
Output is correct |
| 11 |
Correct |
2169 ms |
496328 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3295 ms |
337916 KB |
Output is correct |
| 2 |
Correct |
4086 ms |
346100 KB |
Output is correct |
| 3 |
Correct |
2768 ms |
336836 KB |
Output is correct |
| 4 |
Correct |
4646 ms |
353764 KB |
Output is correct |
| 5 |
Correct |
4696 ms |
357860 KB |
Output is correct |
| 6 |
Correct |
3910 ms |
352156 KB |
Output is correct |
| 7 |
Correct |
2691 ms |
338404 KB |
Output is correct |
| 8 |
Correct |
1668 ms |
481888 KB |
Output is correct |
| 9 |
Correct |
3891 ms |
431044 KB |
Output is correct |
| 10 |
Correct |
3048 ms |
503476 KB |
Output is correct |
| 11 |
Correct |
3768 ms |
434744 KB |
Output is correct |
| 12 |
Correct |
3151 ms |
462652 KB |
Output is correct |
