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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#619894 | #7900. Gifts from Knowledge | tsai | WA | 6ms | 32452kb | C++14 | 1.7kb | 2024-10-07 15:48:30 | 2024-10-07 15:48:30 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod=1000000007;
vector<int>v[1000050];
int sumc[2000050]={0};
int root[2000050]={0};
int vis[2000050]={0};
int find(int x){
if(x!=root[x]){
root[x]=find(root[x]);
}
return root[x];
}
void merge(int a,int b){
int ra=find(a);
int rb=find(b);
root[ra]=root[rb];
return ;
}
ll qm(ll a,ll x){
ll ans=1;
while(x){
if(x%2){
ans=(ans%mod*a%mod)%mod;
}
x/=2;
a=(a%mod)*(a%mod)%mod;
}
return ans%mod;
}
void solve(){
int r,c;
scanf("%d %d",&r,&c);
for(int i=1;i<=c;i++){sumc[i]=0;}
for(int i=1;i<=max(r,c);i++){
v[i].clear();
}
for(int i=1;i<=r;i++){
string s;
cin>>s;
for(int j=1;j<=c;j++){
int tem=(int)s[j-1]-48;
sumc[j]+=tem;
if(tem==1){
v[j].push_back(i);//列的1的行
}
}
}
for(int i=1;i<=c;i++){
if(sumc[i]+sumc[c-i+1]>2){
printf("0");
return ;
}
}
for(int i=1;i<=2*max(r,c);i++){
root[i]=i;
}
for(int i=1;i<=c;i++){
if(sumc[i]+sumc[c-i+1]==2){
if(sumc[i]==0) continue;
if(sumc[i]==1){//相同
merge(v[c-i+1][0],v[i][0]);
merge(v[c-i+1][0]+r,v[i][0]+r);
}else{//相反
merge(v[i][1],v[i][0]+r);
merge(v[i][1]+r,v[i][0]);
}
}
}
for(int i=1;i<=2*r;i++){
vis[i]=0;
}
for(int i=1;i<=r;i++){
if(find(i)==find(i+r)){
printf("0");return;
}
vis[find(i)]=1;
}
for(int i=2*r;i>r;i--){
vis[find(i)]=1;
}
ll siz=0;
for(int i=1;i<=2*r;i++){
siz+=(vis[i]==0);
}
ll ans=1;
ans=qm(2,siz);
printf("%lld",ans);
}
int main(){
int t;
scanf("%d",&t);
while(t--){
solve();
if(t) printf("\n");
}
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 6ms
memory: 32452kb
input:
3 3 5 01100 10001 00010 2 1 1 1 2 3 001 001
output:
4 0 4
result:
wrong answer 3rd numbers differ - expected: '2', found: '4'