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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#631818 | #7900. Gifts from Knowledge | Pepinot | WA | 20ms | 3876kb | C++20 | 2.2kb | 2024-10-12 10:26:35 | 2024-10-12 10:26:42 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define fi first
#define se second
const int mod = 1e9 + 7;
int n, m;
struct DSU{
vector<int> fa;
DSU(int n) : fa(n) {
for(int i = 0; i < n; i++){
fa[i] = i;
}
}
int find(int x){
if (fa[x] != x) fa[x] = find(fa[x]);
return fa[x];
}
void merge(int x, int y){
if(find(x) != find(y)){
fa[find(x)] = find(y);
}
}
};
void solve(){
int res = 0;
cin >> n >> m;
vector<vector<int>> a(n + 5, vector<int>(m + 5));
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
char ch;
cin >> ch;
a[i][j] = ch - '0';
}
}
DSU d(2 * n + 5);
for(int j = 1; j <= m / 2; j++){
vector<int> vec[2];
for(int i = 1; i <= n; i++){
if(a[i][j]) vec[0].pb(i);
if(a[i][m - j + 1]) vec[1].pb(i);
}
if(vec[0].size() + vec[1].size() > 2){
cout << 0 << '\n';
return;
}
// for(int x = 0; x < 2; x++)
// for(int y = 0; y < vec[x].size(); y++)
// for(int z = y + 1; z < vec[x].size(); z++){
// int u = vec[x][y], v = vec[x][z];
// d.merge(u + n, v);
// d.merge(u, v + n);
// }
if(vec[0].size()+vec[1].size()==2){
if(vec[0].size() && vec[1].size()){
int u = vec[0][0], v = vec[1][0];
d.merge(u, v);
d.merge(u + n, v + n);
}
else{
if(vec[0].size()){
int u = vec[0][0], v = vec[0][1];
d.merge(u, v);
d.merge(u + n, v + n);
}
else{
int u = vec[1][0], v = vec[1][1];
d.merge(u, v);
d.merge(u + n, v + n);
}
}
}
}
if(m % 2 == 1){
int j = (m + 1) / 2;
vector<int> vec;
for(int i = 1; i <= n; i++)
if(a[i][j]) vec.pb(i);
if(vec.size() > 1){
cout << 0 << '\n';
return;
}
}
for(int i = 1; i <= n; i++)
if(d.find(i) == d.find(i + n)){
cout << 0 << '\n';
return;
}
int cnt = 0;
for(int i = 1; i <= 2 * n; i++)
if(d.find(i) == i) cnt++;
cnt /= 2;
res = 1;
for(int i = 1; i <= cnt; i++){
res = res * 2 % mod;
}
cout << res << '\n';
}
signed main(){
ios::sync_with_stdio(0);cin.tie(0);
int T = 1;
cin >> T;
while (T--)
solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3556kb
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: 20ms
memory: 3876kb
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: 20ms
memory: 3648kb
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'