QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#561703 | #7900. Gifts from Knowledge | rotcar07 | WA | 13ms | 36908kb | C++20 | 1.4kb | 2024-09-13 09:09:05 | 2024-09-13 09:09:05 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
constexpr int maxn=1e6+5;
string s[maxn];
int fa[maxn<<1];
inline int getfa(int x){return fa[x]==x?x:fa[x]=getfa(fa[x]);}
inline void con(int u,int v){
// cout<<u<<' '<<v<<'\n';
u=getfa(u),v=getfa(v);
if(u==v) return;
fa[v]=u;
}
inline void solve(){
int n,m;
cin>>n>>m;
for(int i=1;i<=n;i++) cin>>s[i],s[i]=' '+s[i];
for(int i=1;i<=2*n;i++) fa[i]=i;
if(m&1){
int cnt=0;
for(int i=1;i<=n;i++) cnt+=(s[i][(m+1)/2]-'0');
if(cnt>1){
cout<<"0\n";
return;
}
}
for(int j=1;j<m-j+1;j++){
vector<pair<int,int>> v;
for(int i=1;i<=n;i++){
if(s[i][j]=='1') v.emplace_back(i,0);
if(s[i][m-j+1]=='1') v.emplace_back(i,1);
}
if(v.size()>2) return cout<<"0\n",void();
if(v.size()<1||v[0].first==v[1].first) continue;
auto tr=[&](pair<int,int> p,int rev){
if(rev) p.second^=1;
return p.first*2-p.second;
};
con(tr(v[0],0),tr(v[1],1));
con(tr(v[0],1),tr(v[1],0));
}
int cnt=0;
for(int i=1;i<=2*n;i++) if(fa[i]==i) cnt++;
cnt/=2;
int ans=1;
while(cnt--) ans=ans*2%1000000007;
cout<<ans<<'\n';
}
int main(){
std::ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int t;cin>>t;
while(t--) solve();
}
Details
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Test #1:
score: 100
Accepted
time: 4ms
memory: 36820kb
input:
3 3 5 01100 10001 00010 2 1 1 1 2 3 001 001
output:
4 0 2
result:
ok 3 number(s): "4 0 2"
Test #2:
score: 0
Accepted
time: 13ms
memory: 35652kb
input:
15613 10 10 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 15 8 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1 5 00000 5 9 000000000 000000000 0000...
output:
1024 32768 2 32 32768 128 32 16 16 2 16384 16384 128 128 32768 8192 128 64 16384 2 4 2 4096 16 4096 1024 32768 32768 16384 8 128 2 16 4096 8192 32768 8192 8192 16 16384 16384 256 128 8 256 8 4096 512 2 4 32 32 2 64 512 1024 32768 32768 2 64 16384 16 8192 16 256 16 64 8192 8192 64 1024 2 32768 2 4 51...
result:
ok 15613 numbers
Test #3:
score: -100
Wrong Answer
time: 11ms
memory: 36908kb
input:
15759 9 6 000000 000000 000000 000000 000000 000000 000000 000000 000000 5 15 010000000000000 000000000000000 000000000000000 000100000000000 000100000000000 14 12 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000000000 000000...
output:
512 8 16384 256 1024 1024 8192 4 1 512 512 256 512 8 2 256 16 2048 128 64 16 4096 512 32 32768 8192 32 1024 128 8 4096 32 32768 256 16 16384 8 512 16 2048 8 8 512 1024 64 32 32 8 512 4 8192 256 1024 32768 2 8 512 512 256 32 2 1024 8192 4 64 8 2 16384 32768 16384 1024 4096 16384 16384 128 256 1 4096 ...
result:
wrong answer 2nd numbers differ - expected: '16', found: '8'