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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#747083 | #9170. Cycle Game | ucup-team134 | WA | 0ms | 3812kb | C++14 | 3.0kb | 2024-11-14 16:18:54 | 2024-11-14 16:18:55 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define f first
#define s second
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define ios ios_base::sync_with_stdio(false);cin.tie(NULL)
#define ld long double
#define li __int128
using namespace std;
mt19937 rng(time(NULL));
int main()
{
// 8:50
ios;
int n,m,k;
cin>>n>>m>>k;
vector<pair<int,int>> o;
for(int i=0;i<k;i++){
int x,y;
cin>>x>>y;
o.pb({x-1,y-1});
}
vector<int> dx={1,1,1,0,-1,-1,-1,0},dy={1,0,-1,-1,-1,0,1,1};
vector<int> par(n*m+1),siz(n*m+1);
int cntComp;
vector<vector<bool>> on(n,vector<bool>(m));
vector<vector<int>> cnt(n,vector<int>(m));
int cnt8;
vector<pair<int,vector<pair<int,int>>>> back;
auto inside=[&](int x,int y){
return x>=0&&x<n&&y>=0&&y<m;
};
auto onBorder=[&](int x,int y){
return x==0||x==n-1||y==0||y==m-1;
};
int cntOn;
auto add=[&](int x,int y){
on[x][y]=1;
cntOn++;
for(int kk=0;kk<8;kk++){
int xx=x+dx[kk],yy=y+dy[kk];
if(inside(xx,yy)){
cnt[xx][yy]++;
if(cnt[xx][yy]==8)cnt8++;
}
}
};
auto rem=[&](int x,int y){
on[x][y]=0;
cntOn--;
for(int kk=0;kk<8;kk++){
int xx=x+dx[kk],yy=y+dy[kk];
if(inside(xx,yy)){
if(cnt[xx][yy]==8)cnt8--;
cnt[xx][yy]--;
}
}
};
function<int(int)> find=[&](int tr){
return tr==par[tr]?tr:find(par[tr]);
};
auto snap=[&](){
back.pb({cntComp,{}});
};
auto reverse=[&](){
for(int i=sz(back.back().s)-1;i>=0;i--){
int a=back.back().s[i].f,p=back.back().s[i].s;
siz[par[a]]-=siz[a];
par[a]=p;
}
cntComp=back.back().f;
back.pop_back();
};
auto merge=[&](int a,int b){
a=find(a);
b=find(b);
if(a==b)return;
if(siz[a]>siz[b])swap(a,b);
if(sz(back))
back.back().s.pb({a,par[a]});
par[a]=b;
siz[b]+=siz[a];
cntComp--;
};
auto remD=[&](int x,int y,bool init){
assert(!on[x][y]);
if(onBorder(x,y)){
merge(x*m+y,n*m);
}
int t=4;
if(!init)t=8;
for(int kk=0;kk<t;kk++){
int xx=x+dx[kk],yy=y+dy[kk];
if(inside(xx,yy)&&!on[xx][yy]){
merge(x*m+y,xx*m+yy);
}
}
};
auto okState=[&](){
return cntComp-cntOn==1&&cnt8==0;
};
iota(all(par),0);
fill(all(siz),1);
cntComp=sz(par);
for(auto p:o){
add(p.f,p.s);
}
for(int x=0;x<n;x++){
for(int y=0;y<m;y++){
if(!on[x][y]){
remD(x,y,1);
}
}
}
for(int i=0;i<n*m;i++){
par[i]=find(i);
}
vector<bool> ok(k,1);
function<void(int,int)> solve=[&](int l,int r){
if(okState())return;
if(l==r){
ok[l]=0;
return;
}
int m=(l+r)>>1;
snap();
for(int i=m+1;i<=r;i++){
rem(o[i].f,o[i].s);
remD(o[i].f,o[i].s,0);
}
solve(l,m);
reverse();
for(int i=m+1;i<=r;i++){
add(o[i].f,o[i].s);
}
for(int i=l;i<=m;i++){
if(!ok[i]){
rem(o[i].f,o[i].s);
remD(o[i].f,o[i].s,0);
}
}
solve(m+1,r);
};
solve(0,k-1);
for(int i=0;i<k;i++){
printf(ok[i]?"1":"0");
}
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 3812kb
input:
4 3 7 2 1 2 2 2 3 3 1 3 2 4 1 4 2
output:
0000000
result:
wrong answer 1st words differ - expected: '1111111', found: '0000000'