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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#711266 | #4782. 完美的旅行 | NineSuns | 0 | 0ms | 3744kb | C++14 | 1.8kb | 2024-11-05 08:32:06 | 2024-11-05 08:32:07 |
answer
#include <bits/stdc++.h>
#define ll long long
#define pii pair <int, int>
#define fi first
#define se second
#define pb push_back
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
const int N = 64, M = 10005, mod = 998244353;
int n, m, a[N][N], ans[N][M];
struct mat {
int a[N][N];
void clr () { for (int i = 0;i < n;i++) memset(a[i], 0, n<<2); }
void init () {
clr();
for (int i = 0;i < n;i++) a[i][i] = 1;
}
friend mat operator * (const mat & a, const mat & b) {
mat c; c.clr();
for (int i = 0;i < n;i++) {
for (int j = 0;j < n;j++) {
for (int z = 0;z < n;z++) (c.a[i][j] += (1ll*a.a[i][z]*b.a[z][j]%mod)) %= mod;
}
}
return c;
}
};
void solve () {
cin >> n >> m;
for (int i = 0;i < n;i++) for (int j = 0;j < n;j++) cin >> a[i][j];
int V = 0;
for (int i = n-1;i >= 0;i--) {
vector <int> td;
for (int j = 0;j < n;j++) {
if ((i&j) == i) td.pb(j);
}
mat d; d.clr();
for (int j = 0;j < n;j++) {
for (int z = 0;z < n;z++) d.a[j][z] = a[j][z];
}
mat res; res.init();
for (int j = 1;j <= m;j++) {
res = res*d;
for (int x : td) {
for (int y : td) (ans[i][j] += res.a[x][y]) %= mod;
}
for (int x : td) (res.a[x][x] += ans[i][j]) %= mod;
}
for (int j = i+1;j < n;j++) {
if ((j&i)^i) continue;
for (int z = 1;z <= m;z++) {
int o = __builtin_popcount(j^i);
if (o&1) ans[i][z] -= ans[j][z]; else ans[i][z] += ans[j][z];
ans[i][z] %= mod;
}
}
for (int z = 1;z <= m;z++) {
ans[i][z] = (ans[i][z]+mod)%mod;
// cout << i << " " << z << " " << ans[i][z] << endl;
V ^= ans[i][z];
}
}
cout << V;
}
signed main () {
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int T = 1;
while (T--) solve();
return 0;
}
Details
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Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 3744kb
input:
4 20 53674686 128460215 363694167 120271218 578912024 941426068 993595265 587468617 731649477 694107878 355552389 226535630 99325151 243772822 66420647 578481511
output:
1007247455
result:
wrong answer 1st numbers differ - expected: '588479706', found: '1007247455'
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Time Limit Exceeded
Test #21:
score: 0
Time Limit Exceeded
input:
16 20000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 0 3 2 5 4 7 6 9 8 11 10 13 12 15 14 2 3 0 1 6 7 4 5 10 11 8 9 14 15 12 13 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 4 5 6 7 0 1 2 3 12 13 14 15 8 9 10 11 5 4 7 6 1 0 3 2 13 12 15 14 9 8 11 10 6 7 4 5 2 3 0 1 14 15 12 13 10 11 8 9 7 6 5 4 3 2 1 0 15 14 13 ...
output:
result:
Subtask #4:
score: 0
Skipped
Dependency #1:
0%