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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#611733 | #9309. Graph | wjc | WA | 107ms | 12488kb | C++14 | 2.4kb | 2024-10-04 22:25:31 | 2024-10-04 22:25:33 |
Judging History
answer
#include <bits/stdc++.h>
typedef long long LL;
typedef long double LD;
typedef unsigned long long ULL;
typedef std::pair<int, int> pii;
typedef std::pair<LL, int> pli;
typedef std::pair<LL, LL> pll;
#define fi first
#define se second
#define MP std::make_pair
LL read() {
LL s = 0; int f = 1;
char c = getchar();
while (!(c >= '0' && c <= '9'))
f ^= (c == '-'), c = getchar();
while (c >= '0' && c <= '9')
s = s * 10 + (c ^ 48), c = getchar();
return f ? s : -s;
}
const LL INF = 0x3f3f3f3f3f3f3f3fll;
const int N = 4e5 + 7, MOD = 998244353;
template<typename T> T& Fmax(T& x, T y) { return x = x < y ? y : x; };
template<typename T> T& Fmin(T& x, T y) { return x = x < y ? x : y; };
auto fplus = [](LL x, LL y) { return x + y < MOD ? x + y : x + y - MOD; };
auto fminus = [](LL x, LL y) { return x < y ? x - y + MOD : x - y; };
auto Fplus = [](LL &x, LL y) { x = fplus(x, y); };
auto Fminus = [](LL &x, LL y) { x = fminus(x, y); };
LL fpow(LL x, LL y = MOD - 2) {
LL ans = 1; x %= MOD;
for (; y; x = x * x % MOD, y >>= 1)
if (y & 1) ans = ans * x % MOD;
return ans;
}
bool isp[N];
LL n, m, tot, pr[N], f[2][N], ans = 1;
LL id(LL x, LL y) { return x ? n / y : y; }
pll ID(LL x) { return x <= m ? MP(0, x) : MP(1, n / x); }
void Euler(int x) {
memset(isp, 1, sizeof(isp));
for (int i = 2; i <= x; i ++) {
if (isp[i]) pr[++ tot] = i;
for (int j = 1; j <= tot && i * pr[j] <= x; j ++) {
isp[i * pr[j]] = false;
if (i % pr[j] == 0) break;
}
}
}
signed main() {
n = read(), Euler(m = sqrtl(n));
// std::cout << m << ' ' << m * m << ' ' << n << '\n';
for (int i = 0; i <= 1; i ++)
for (int j = 1; j <= m; j ++) f[i][j] = n / id(i, j) - 1;
for (int i = 1; i <= tot; i ++) {
LL lim = n / (pr[i] * pr[i]);
for (int j = 1; j <= m && id(0, j) <= lim; j ++) {
pll t = ID(id(0, j) * pr[i]);
f[0][j] += i - 1 - f[t.fi][t.se];
}
for (int j = m; j && id(1, j) <= lim; j --) {
pll t = ID(id(1, j) * pr[i]);
f[1][j] += i - 1 - f[t.fi][t.se];
}
}
for (LL l = 1, r, k; l <= n / 3; l = r + 1) {
r = n / (n / l), k = n / l;
pll t = ID(l); LL c = f[t.fi][t.se];
if (l * 2 <= n) t = ID(l * 2), c -= f[t.fi][t.se];
LL f = (k == 3 ? 3 : fpow(k, c) * (k - c - 1) % MOD);
ans = ans * fpow(f, r - l + 1) % MOD;
// std::cout << l << ' ' << r << ' ' << k << ' ' << c << ' ' << f << ' ' << ans << '\n';
}
std::cout << ans << '\n';
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 8172kb
input:
4
output:
8
result:
ok answer is '8'
Test #2:
score: 0
Accepted
time: 1ms
memory: 6092kb
input:
2
output:
1
result:
ok answer is '1'
Test #3:
score: 0
Accepted
time: 1ms
memory: 8156kb
input:
123
output:
671840470
result:
ok answer is '671840470'
Test #4:
score: 0
Accepted
time: 1ms
memory: 8084kb
input:
233
output:
353738465
result:
ok answer is '353738465'
Test #5:
score: 0
Accepted
time: 1ms
memory: 8172kb
input:
5981
output:
970246821
result:
ok answer is '970246821'
Test #6:
score: 0
Accepted
time: 0ms
memory: 10004kb
input:
86422
output:
897815688
result:
ok answer is '897815688'
Test #7:
score: 0
Accepted
time: 1ms
memory: 8228kb
input:
145444
output:
189843901
result:
ok answer is '189843901'
Test #8:
score: 0
Accepted
time: 2ms
memory: 9912kb
input:
901000
output:
819449452
result:
ok answer is '819449452'
Test #9:
score: 0
Accepted
time: 1ms
memory: 9848kb
input:
1000000
output:
113573943
result:
ok answer is '113573943'
Test #10:
score: 0
Accepted
time: 2ms
memory: 9904kb
input:
23333333
output:
949849384
result:
ok answer is '949849384'
Test #11:
score: 0
Accepted
time: 2ms
memory: 9844kb
input:
102850434
output:
604886751
result:
ok answer is '604886751'
Test #12:
score: 0
Accepted
time: 16ms
memory: 8320kb
input:
998244353
output:
0
result:
ok answer is '0'
Test #13:
score: 0
Accepted
time: 12ms
memory: 10228kb
input:
1000000007
output:
318420284
result:
ok answer is '318420284'
Test #14:
score: 0
Accepted
time: 23ms
memory: 10148kb
input:
2147483547
output:
688759898
result:
ok answer is '688759898'
Test #15:
score: 0
Accepted
time: 47ms
memory: 12488kb
input:
5120103302
output:
116870489
result:
ok answer is '116870489'
Test #16:
score: -100
Wrong Answer
time: 107ms
memory: 11316kb
input:
19834593299
output:
-768482857
result:
wrong answer expected '523663743', found '-768482857'