QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#723114 | #7900. Gifts from Knowledge | Stelor | WA | 13ms | 3756kb | C++20 | 4.7kb | 2024-11-07 21:11:39 | 2024-11-07 21:11:43 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const ll mod=1e9+7;
ll qui(ll a,ll b,ll c){
ll ret=1;
while(b){
if(b&1) ret=ret*a%c;
b>>=1;
a=a*a%c;
}
return ret;
}
void solve(){
int n,m;
cin >> n >> m;
vector<string> a(n+1);
vector<int> pre(2*n+10);
vector<int> siz(2*n+10);
for(int i=1;i<=2*n;++i) {
pre[i]=i;
siz[i]=1;
}
function<int(int)> root=[&](int x)->int{
if(x==pre[x]) return x;
return pre[x]=root(pre[x]);
};
for(int i=1;i<=n;++i){
string t;
cin >> t;
t="#"+t;
a[i]=t;
}
if(m==1){
int p=0;
for(int j=1;j<=n;++j){
if(a[j][1]) p++;
}
if(p>1) {
cout<<"0\n";
return;
}else{
cout<<qui(2,n,mod)<<'\n';
return;
}
}
for(int l=1,r=m;l<=r;++l,--r){
int now=0;
for(int j=1;j<=n;++j){
if(a[j][l]=='1'){
now++;
}
if(l!=r){
if(a[j][r]=='1'){
now++;
}
}
}
if(now>2){
cout<<"0\n";return;
}
}
for(int l=1,r=m;l<=r;++l,--r){
int num1=0,num2=0;
for(int j=1;j<=n;++j){
if(a[j][l]=='1'){
num1++;
}
if(a[j][r]=='1'){
num2++;
}
}
if(l==r){
if(num1==2){
int p1,p2,_=0;
for(int j=1;j<=n;++j){
if(a[j][l]=='1'){
if(_==0){
_++;
p1=j;
}else{
_++;
p2=j;
break;
}
}
}
int a1=root(p1);
int b1=root(p2);
int a2=root(p1+n);
int b2=root(p2+n);
siz[b2]+=siz[a1];
pre[a1]=b2;
siz[a2]+=siz[b1];
pre[b1]=a2;
}
break;
}
if(num1==2&&num2==0){
int p1,p2,_=0;
for(int j=1;j<=n;++j){
if(a[j][l]=='1'){
if(_==0){
_++;
p1=j;
}else{
_++;
p2=j;
break;
}
}
}
int a1=root(p1);
int b1=root(p2);
int a2=root(p1+n);
int b2=root(p2+n);
siz[b2]+=siz[a1];
pre[a1]=b2;
siz[a2]+=siz[b1];
pre[b1]=a2;
}
else if(num1==0&&num2==2){
int p1,p2,_=0;
for(int j=1;j<=n;++j){
if(a[j][r]=='1'){
if(_==0){
_++;
p1=j;
}else{
_++;
p2=j;
break;
}
}
}
int a1=root(p1);
int b1=root(p2);
int a2=root(p1+n);
int b2=root(p2+n);
siz[b2]+=siz[a1];
pre[a1]=b2;
siz[a2]+=siz[b1];
pre[b1]=a2;
}else if(num1==1&&num2==1){
int p1,p2;
for(int j=1;j<=n;++j){
if(a[j][l]=='1'){
p1=j;
}
if(a[j][r]=='1'){
p2=j;
}
}
if(p1==p2) continue;
int a1=root(p1);
int b1=root(p2);
int a2=root(p1+n);
int b2=root(p2+n);
siz[b1]+=siz[a1];
pre[a1]=b1;
siz[a2]+=siz[b2];
pre[b2]=a2;
}
}
vector<bool> vis(n+1);
int num=0;
for(int i=1;i<=n;++i){
int x=root(i);
int y=root(i+n);
if(x==y){
cout<<"0\n";return;
}
}
for(int i=1;i<=2*n;++i){
int p=root(i);
//cout<<p<<"\n";
if(vis[p]) continue;
vis[p]=true;
num++;
}
//cout<<num<<endl;
num>>=1;
ll ans=qui(2,num,mod);
cout<<ans<<"\n";
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin>>t;
while(t--){
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3756kb
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: -100
Wrong Answer
time: 13ms
memory: 3552kb
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 0 8192 16 16384 16384 256 128 8 256 8 4096 512 2 4 32 0 2 64 512 1024 32768 32768 2 64 16384 16 8192 16 256 16 64 8192 8192 64 1024 2 32768 2 4 512 40...
result:
wrong answer 37th numbers differ - expected: '8192', found: '0'