QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#669332 | #7900. Gifts from Knowledge | nageing | WA | 14ms | 3636kb | C++20 | 2.0kb | 2024-10-23 18:12:30 | 2024-10-23 18:12:30 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
const int mod = 1e9 + 7;
bool chmin(int &x, int y) {
if (x > y) {
x = y;
return 1;
}
return 0;
}
bool chmax(int &x, int y) {
if (x < y) {
x = y;
return 1;
}
return 0;
}
struct DSU {
std::vector<int> f, siz;
DSU() {}
DSU(int n) {
init(n);
}
void init(int n) {
f.resize(n);
std::iota(f.begin(), f.end(), 0);
siz.assign(n, 1);
}
int find(int x) {
while (x != f[x]) {
x = f[x] = f[f[x]];
}
return x;
}
bool same(int x, int y) {
return find(x) == find(y);
}
bool merge(int x, int y) {
x = find(x);
y = find(y);
if (x == y) {
return false;
}
siz[x] += siz[y];
f[y] = x;
return true;
}
int size(int x) {
return siz[find(x)];
}
};
void solve() {
int n, m;
cin >> n >> m;
vector<string>g(n);
for (int i = 0; i < n; i ++) {
cin >> g[i];
}
vector<int> cnt(m);
for (int i = 0; i < n; i ++) {
for (int j = 0; j < m; j ++) {
if (g[i][j] == '1') {
cnt[j] ++;
cnt[m - j - 1] ++;
}
}
}
ll ans = 1;
for (int i = 0; i < m; i ++) {
if (cnt[i] > 2) {
cout << 0 << '\n';
return;
}
}
vector<int> pos(m, -1);
DSU dsu(n);
for (int i = 0; i < n; i ++) {
for (int j = 0; j < m; j ++) {
if (g[i][j] == '1') {
if (pos[j] != -1) {
dsu.merge(pos[j], i);
} else {
pos[m - j - 1] = i;
pos[j] = i;
}
}
}
}
map<int, bool> mp;
for (int i = 0; i < n; i ++) {
int p = dsu.find(i);
//cout << p << " \n"[i == n - 1];
if (!mp.count(p)) {
mp[p] = 1;
ans = ans * 2 % mod;
}
}
cout << ans << '\n';
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
int t = 1;
cin >> t;
while (t --) {
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3620kb
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: 3636kb
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: 14ms
memory: 3512kb
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'