QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#337858 | #7398. Triangle Tiling | Kevin5307 | WA | 2ms | 11864kb | C++23 | 5.3kb | 2024-02-25 15:15:06 | 2024-02-25 15:15:07 |
Judging History
answer
//Author: Kevin
#include<bits/stdc++.h>
//#pragma GCC optimize("O2")
using namespace std;
#define ll long long
#define ull unsigned ll
#define pb emplace_back
#define mp make_pair
#define ALL(x) (x).begin(),(x).end()
#define rALL(x) (x).rbegin(),(x).rend()
#define srt(x) sort(ALL(x))
#define rev(x) reverse(ALL(x))
#define rsrt(x) sort(rALL(x))
#define sz(x) (int)(x.size())
#define inf 0x3f3f3f3f
#define pii pair<int,int>
#define lb(v,x) (int)(lower_bound(ALL(v),x)-v.begin())
#define ub(v,x) (int)(upper_bound(ALL(v),x)-v.begin())
#define uni(v) v.resize(unique(ALL(v))-v.begin())
#define longer __int128_t
void die(string S){puts(S.c_str());exit(0);}
char grid[5005][5005];
int val[5005][5005];
bool token[5005];
class segtree
{
public:
#define ls (x<<1)
#define rs (ls|1)
int mn[5005<<2];
int tag[5005<<2];
void build(int x,int l,int r)
{
mn[x]=0;
tag[x]=0;
if(l==r) return ;
int mid=(l+r)/2;
build(ls,l,mid);
build(rs,mid+1,r);
}
void build2(int x,int l,int r,int tr)
{
if(l<=tr)
mn[x]=val[l][tr];
else
mn[x]=0;
tag[x]=0;
if(l==r) return ;
int mid=(l+r)/2;
build2(ls,l,mid,tr);
build2(rs,mid+1,r,tr);
}
void pushdown(int x,int l,int r)
{
mn[x]+=tag[x];
if(l!=r)
{
tag[ls]+=tag[x];
tag[rs]+=tag[x];
}
tag[x]=0;
}
int query(int x,int l,int r,int ql,int qr)
{
pushdown(x,l,r);
if(l==ql&&r==qr)
return mn[x];
int mid=(l+r)/2;
if(qr<=mid)
return query(ls,l,mid,ql,qr);
if(ql>mid)
return query(rs,mid+1,r,ql,qr);
return min(query(ls,l,mid,ql,mid),query(rs,mid+1,r,mid+1,qr));
}
void pushup(int x,int l,int r)
{
int mid=(l+r)/2;
pushdown(ls,l,mid);
pushdown(rs,mid+1,r);
mn[x]=min(mn[ls],mn[rs]);
}
void update(int x,int l,int r,int ql,int qr,int v)
{
pushdown(x,l,r);
if(l==ql&&r==qr)
{
tag[x]+=v;
return ;
}
int mid=(l+r)/2;
if(ql<=mid)
update(ls,l,mid,ql,min(mid,qr),v);
if(qr>mid)
update(rs,mid+1,r,max(mid+1,ql),qr,v);
pushup(x,l,r);
}
#undef ls
#undef rs
}segt[5005];
char ans[5005][5005];
bool used[5005][5005];
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t;
cin>>t;
while(t--)
{
int n;
cin>>n;
for(int i=1;i<=n;i++)
{
string s;
cin>>s;
for(int j=0;j<i;j++)
grid[i][j+1]=s[j];
}
for(int i=1;i<n;i++)
for(int j=1;j<=i;j++)
used[i][j]=0;
for(int i=1;i<=n;i++)
for(int j=i;j<=n;j++)
val[i][j]=0;
vector<pii> vec;
for(int i=1;i<=n;i++)
for(int j=1;j<=i;j++)
if(grid[i][j]=='0')
{
ans[i][j]='-';
vec.pb(i,j);
val[j][j+n-i]++;
}
else
ans[i][j]='2';
if(sz(vec)!=n)
{
cout<<"Impossible!\n";
continue;
}
for(int len=1;len<=n;len++)
for(int i=1,j=len;j<=n;i++,j++)
val[i][j]+=val[i+1][j]+val[i][j-1]-val[i+1][j-1];
bool flag=1;
for(int len=1;len<=n;len++)
for(int i=1,j=len;j<=n;i++,j++)
{
val[i][j]-=len;
if(val[i][j]>0)
flag=0;
val[i][j]=-val[i][j];
}
srt(vec);
for(int i=0;i<n;i++)
if(vec[i].first<=i)
flag=0;
if(!flag)
{
cout<<"Impossible!\n";
continue;
}
memset(token,0,sizeof(token));
for(int i=1;i<=n;i++)
if(grid[n][i]=='1')
token[i]=1;
for(int j=1;j<=n;j++)
segt[j].build2(1,1,n,j);
bool flag_=0;
for(int i=n;i>1;i--)
{
for(int j=1;j<=i;j++)
if(token[j]&&grid[i][j]=='0')
token[j]=0;
static bool ntoken[5005];
memset(ntoken,0,sizeof(ntoken));
int lst=inf;
for(int j=i;j>=1;j--)
{
flag_=0;
if(token[j])
{
int mn=segt[j+n-i].query(1,1,n,1,j);
if(mn&&!used[i-1][j]&&j!=i)
{
assert(j!=i);
ntoken[j]=1;
segt[j+n-i].update(1,1,n,1,j,-1);
ans[i][j]='3';
}
else if(!used[i-1][j])
{
int p=i;
while(p&&grid[p][j-(i-p)]=='1')
{
ans[p][j-(i-p)]='1';
p--;
used[p][j-(i-p)]=1;
}
// assert(p);
for(int k=j+n-i;k<=n;k++)
segt[k].update(1,1,n,j-(i-p)+1,j,-1);
}
else
{
int p=i-1;
ntoken[j-1]=1;
used[p][j-(i-p)]=1;
ans[i][j]='1';
// for(int k=j+n-i;k<=n;k++)
// segt[k].update(1,1,n,j-(i-p)+1,j,-1);
if(lst==inf)
lst=j;
flag_=1;
}
}
if(lst!=inf&&!flag_)
{
// cerr<<"! "<<j+1<<" "<<lst<<endl;
for(int k=j+1+n-i;k<=n;k++)
segt[k].update(1,1,n,j+1,min(k-n+i,lst),-1);
lst=inf;
}
}
if(lst!=inf)
{
// cerr<<1<<" "<<lst<<endl;
for(int k=1+n-i;k<=n;k++)
segt[k].update(1,1,n,1,min(k-n+i,lst),-1);
}
memcpy(token,ntoken,sizeof(token));
}
bool flag2=1;
for(int i=1;i<=n;i++)
{
if(ans[i][i]=='3'||ans[i][1]=='1')
flag2=0;
for(int j=2;j<=i;j++)
if(ans[i][j-1]=='3'&&ans[i][j]=='1')
flag2=0;
for(int j=1;j<=i;j++)
if(ans[i][j]=='3'&&ans[i-1][j]=='2')
flag2=0;
for(int j=2;j<=i;j++)
if(ans[i][j]=='1'&&ans[i-1][j-1]=='2')
flag2=0;
}
if(!flag2)
{
cout<<"Impossible!\n";
continue;
}
for(int i=1;i<=n;i++)
{
for(int j=1;j<=i;j++)
cout<<ans[i][j];
cout<<'\n';
}
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 2ms
memory: 11824kb
input:
1 4 0 11 010 1101
output:
- 21 -3- 33-1
result:
ok ok
Test #2:
score: -100
Wrong Answer
time: 2ms
memory: 11864kb
input:
909 6 0 11 100 1111 11100 111110 7 0 11 011 1001 10111 100111 1111111 6 0 00 001 1111 11101 111111 8 1 01 111 1111 10111 101110 1101101 11111100 2 1 00 2 0 01 3 0 01 110 7 1 00 011 1010 11011 110111 1111111 8 1 11 111 1011 11010 011110 1101110 01111111 5 1 00 010 1111 10111 6 0 10 011 0101 01111 111...
output:
- 32 3-- 3332 333-- 33333- Impossible! Impossible! Impossible! 2 -- - -1 - -1 33- Impossible! 2 22 222 2-22 23-2- -3213- 33-333- -1111111 Impossible! Impossible! Impossible! Impossible! 2 -- 2 -- Impossible! - 21 --1 - -1 Impossible! 2 22 2-- -3-1 Impossible! 2 -2 -1- 2111 -2111 3233-1 3--1111 3333-...
result:
wrong answer jury has a solution while user does not