QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#571086 | #7900. Gifts from Knowledge | sml | WA | 23ms | 68156kb | C++14 | 1.7kb | 2024-09-17 20:26:11 | 2024-09-17 20:26:11 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=1e9 + 7,N=2e6+10;
string mp[N];
int p[N];
int qsumi(int a,int b){
int res=1;
while(b){
if(b&1) res=res*a%mod;
b>>=1;
a=a*a%mod;
}
return res;
}
int find(int x) {
if (p[x]==x) {
return x;
}
return p[x]=find(p[x]);
}
void unionn(int x,int y) {
x=find(x);
y=find(y);
if (x==y) {
return;
}
p[x]=y;
}
void solve()
{
int n,m;
cin>>n>>m;
//vector<int>p(2*n+10);
for(int i=1;i<=2*n+1;i++) p[i]=i;
// vector<vector<char>>mp(n+10,vector<char>(m+10));
for(int i=1;i<=n;i++){
cin>>mp[i];
mp[i]=" "+mp[i];
}
vector<int>cnt(m+1,0);
map<int,vector<int>>id;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(mp[i][j]=='1'){
cnt[j]++;
id[j].push_back(i);
}
}
}
if(m%2){
int id=(m+1)/2;
if(cnt[id]>1){
cout<<0<<'\n';
return;
}
}
for(int i=1;i<=m/2;i++){
int ot=m-i+1;
int sum=cnt[i]+cnt[ot];
if(sum>2){
cout<<0<<'\n';
return;
}
if(sum<2) continue;
int r1,r2;
if(cnt[i]==cnt[ot]) r1=id[i][0],r2=id[ot][0];
else{
int cur=i;
if(cnt[cur]<cnt[ot]) swap(cur,ot);
r1=id[cur][0],r2=id[cur][1];
}
if(r1==r2){
continue;
}
int r11=r1+n,r22=r2+n;
unionn(r1,r22),unionn(r2,r11);
}
int ans=0;
for (int i=1; i<=n; i++) {
if (find(i)==find(i+n)) {
// cout<<i<<"****"<<"\n";
cout<<"0\n";
return;
}
}
for (int i=1; i<=2*n; i++) {
find(i);
if (p[i]==i) {
ans+=1;
}
}
cout<<qsumi(2,ans/2)%mod<<'\n';
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0),cout.tie(0);
int t;
cin>>t;
while(t--) solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 8ms
memory: 68156kb
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: 17ms
memory: 67688kb
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: 23ms
memory: 68080kb
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 16 16384 512 1024 4096 32768 4 2 512 512 512 512 8 2 256 16 4096 512 64 16 4096 512 32 32768 8192 32 2048 128 16 4096 64 32768 256 32 16384 8 512 32 2048 8 16 1024 2048 128 64 32 8 512 8 8192 256 8192 32768 2 8 512 512 256 32 2 2048 8192 8 64 8 2 16384 32768 32768 1024 4096 16384 16384 128 256 4...
result:
wrong answer 2380th numbers differ - expected: '0', found: '4'