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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#359848 | #7838. 往日之影 | wsyear | 0 | 163ms | 472428kb | C++14 | 3.7kb | 2024-03-20 22:03:23 | 2024-03-20 22:03:24 |
Judging History
answer
#include <bits/stdc++.h>
#define rep(i, j, k) for (int i = (j); i <= (k); ++i)
#define per(i, j, k) for (int i = (j); i >= (k); --i)
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
using ll = long long;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;
template<class T> void chkmn(T &x, T y) { if (y < x) x = y; }
template<class T> void chkmx(T &x, T y) { if (y > x) x = y; }
using namespace std;
const int maxn = 3000010;
int n, a[4], mod, iv2, ans;
inline void add(int &x, int y) { x += y; if (x >= mod) x -= mod; }
inline void sub(int &x, int y) { x -= y; if (x < 0) x += mod; }
inline int Add(int x, int y) { x += y; if (x >= mod) x -= mod; return x; }
inline int Sub(int x, int y) { x -= y; if (x < 0) x += mod; return x; }
struct Complex {
int a, b;
// a + bi
Complex() { a = b = 0; }
Complex(int x, int y) { a = x, b = y; }
friend Complex operator+(Complex x, Complex y) { return Complex(Add(x.a, y.a), Add(x.b, y.b)); }
friend Complex operator-(Complex x, Complex y) { return Complex(Sub(x.a, y.a), Sub(x.b, y.b)); }
friend Complex operator*(Complex x, Complex y) { return Complex(Sub(1ll * x.a * y.a % mod, 1ll * x.b * y.b % mod), Add(1ll * x.a * y.b % mod, 1ll * x.b * y.a % mod)); }
} w[4], iw[4], pw[4][4][maxn], piw[4][maxn];
Complex fpw(Complex a, ll p) {
Complex res = Complex(1, 0);
while (p) {
if (p & 1) res = res * a;
a = a * a, p >>= 1;
}
return res;
}
void work() {
cin >> n, ans = 0;
rep (i, 0, 3) cin >> a[i];
Complex sum = Complex();
rep (x, -1, 3) rep (y, -1, 3) {
if (x != -1 && !a[x]) continue;
if (y != -1 && !a[y]) continue;
if (x != -1 && x == y && a[x] <= 1) continue;
// i 在 x,-i 在 y
int rest = n - (x != -1) - (y != -1);
if (rest < 0) continue;
for (int p : {0, 2}) {
if (!rest && p == 2) continue;
Complex t = fpw((w[p] * w[p] + Complex(1, 0)) * Complex(iv2, 0), 1ll * rest * (rest - 1) / 2);
if (x != -1) t = t * pw[p][1][rest];
if (y != -1) t = t * pw[p][3][rest];
if (x != -1 && y != -1) t = t * ((w[1] * w[3] + Complex(1, 0)) * Complex(iv2, 0));
if (x != -1 && y != -1) {
if (x == y) t = t * Complex(1ll * a[x] * (a[x] - 1) % mod, 0);
else t = t * Complex(1ll * a[x] * a[y] % mod, 0);
} else if (x != -1) {
t = t * Complex(a[x], 0);
} else if (y != -1) {
t = t * Complex(a[y], 0);
}
static int b[4];
rep (i, 0, 3) b[i] = a[i];
if (x != -1) b[x]--;
if (y != -1) b[y]--;
rep (i, 0, 3) t = t * piw[p][i * b[i]];
if (x != -1) t = t * piw[1][x];
if (y != -1) t = t * piw[3][y];
// cerr << x << " " << y << " " << p << " " << t.a << " " << t.b << endl;
sum = sum + t;
}
}
// cerr << sum.a << " + " << sum.b << "i\n";
rep (i, 1, n) sum = sum * Complex(iv2, 0), sum = sum * Complex(iv2, 0);
cout << sum.a << '\n';
}
int main() {
// freopen("in", "r", stdin);
cin.tie(nullptr) -> ios::sync_with_stdio(false);
int t; cin >> t >> mod, iv2 = (mod + 1) >> 1;
w[0] = Complex(1, 0), w[1] = Complex(0, 1);
w[2] = Complex(mod - 1, 0), w[3] = Complex(0, mod - 1);
iw[0] = Complex(1, 0), iw[1] = Complex(0, mod - 1);
iw[2] = Complex(mod - 1, 0), iw[3] = Complex(0, 1);
rep (i, 0, 3) if (i & 1) {
piw[i][0] = Complex(1, 0);
rep (j, 1, maxn - 1) piw[i][j] = piw[i][j - 1] * iw[i];
}
rep (i, 0, 3) if (!(i & 1)) rep (j, 0, 3) if (j & 1) {
Complex cur = (w[i] * w[j] + Complex(1, 0)) * Complex(iv2, 0);
pw[i][j][0] = Complex(1, 0);
rep (k, 1, 1000000) pw[i][j][k] = pw[i][j][k - 1] * cur;
}
// cerr << 1. * clock() / CLOCKS_PER_SEC << endl;
while (t--) work();
}
详细
Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 10
Accepted
time: 153ms
memory: 472428kb
input:
1 998244353 3 1 1 0 1
output:
0
result:
ok single line: '0'
Test #2:
score: -10
Wrong Answer
time: 159ms
memory: 472360kb
input:
1 998244353 7 0 2 1 4
output:
0
result:
wrong answer 1st lines differ - expected: '998069185', found: '0'
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Skipped
Dependency #2:
0%
Subtask #4:
score: 0
Wrong Answer
Test #23:
score: 0
Wrong Answer
time: 163ms
memory: 472372kb
input:
999 999999001 2 2 0 0 0 3 3 0 0 0 4 4 0 0 0 5 5 0 0 0 6 6 0 0 0 7 7 0 0 0 8 8 0 0 0 9 9 0 0 0 10 10 0 0 0 11 11 0 0 0 12 12 0 0 0 13 13 0 0 0 14 14 0 0 0 15 15 0 0 0 16 16 0 0 0 17 17 0 0 0 18 18 0 0 0 19 19 0 0 0 20 20 0 0 0 21 21 0 0 0 22 22 0 0 0 23 23 0 0 0 24 24 0 0 0 25 25 0 0 0 26 26 0 0 0 27...
output:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
wrong answer 1st lines differ - expected: '499999501', found: '0'
Subtask #5:
score: 0
Skipped
Dependency #1:
0%