QOJ.ac
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 |
|---|---|---|---|---|---|---|---|---|---|
| #19924 | #2601. Lucky Tickets | linmuhan# | AC ✓ | 762ms | 34804kb | C++14 | 757b | 2022-02-13 20:47:54 | 2022-05-08 01:35:51 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 2000010;
ll n, s, q, Ans;
ll fac[N], ifac[N];
ll qpow(ll a,ll b,ll t){ll ans;for(ans=1;b;b>>=1,ans%=t,a%=t)ans*=(b&1?a:1),a=a*a;return ans;}
int main () {
cin >> n >> s >> q;
fac[0] = 1ll; for (int i=1;i<=n+q;i++) fac[i] = fac[i - 1] * i % q;
ifac[n + q] = qpow (fac[n + q], q - 2, q);
for (int i=n+q;i>=0;i--) ifac[i] = ifac[i + 1] * (i + 1) % q;
ll TMP = 0;
for (int i=0;i<q;i++) TMP += qpow (2, i, q), TMP %= q;
for (int i=0;i<n;i++) {
ll prd = qpow (i, q, n);
ll sum = q * i % n;
ll pd = (prd + sum) % n;
if (pd == s) {
Ans += fac[i + q] * ifac[i] % q;
Ans %= q; Ans += TMP * i % q;
Ans %= q;
}
}
cout << Ans << endl;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 5768kb
input:
2 0 2
output:
0
result:
ok 1 number(s): "0"
Test #2:
score: 0
Accepted
time: 3ms
memory: 5504kb
input:
10 9 2
output:
1
result:
ok 1 number(s): "1"
Test #3:
score: 0
Accepted
time: 1ms
memory: 5612kb
input:
3 2 3
output:
2
result:
ok 1 number(s): "2"
Test #4:
score: 0
Accepted
time: 1ms
memory: 5720kb
input:
2 1 2
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 5616kb
input:
4 0 3
output:
1
result:
ok 1 number(s): "1"
Test #6:
score: 0
Accepted
time: 3ms
memory: 5620kb
input:
4 2 3
output:
2
result:
ok 1 number(s): "2"
Test #7:
score: 0
Accepted
time: 3ms
memory: 5648kb
input:
20 4 19
output:
5
result:
ok 1 number(s): "5"
Test #8:
score: 0
Accepted
time: 3ms
memory: 5568kb
input:
30 2 37
output:
23
result:
ok 1 number(s): "23"
Test #9:
score: 0
Accepted
time: 3ms
memory: 5500kb
input:
87 22 67
output:
0
result:
ok 1 number(s): "0"
Test #10:
score: 0
Accepted
time: 3ms
memory: 5512kb
input:
829 135 857
output:
803
result:
ok 1 number(s): "803"
Test #11:
score: 0
Accepted
time: 8ms
memory: 5764kb
input:
6120 2790 9851
output:
4622
result:
ok 1 number(s): "4622"
Test #12:
score: 0
Accepted
time: 39ms
memory: 8660kb
input:
77263 13087 50147
output:
26904
result:
ok 1 number(s): "26904"
Test #13:
score: 0
Accepted
time: 495ms
memory: 25500kb
input:
682298 437284 638801
output:
10038
result:
ok 1 number(s): "10038"
Test #14:
score: 0
Accepted
time: 523ms
memory: 26296kb
input:
823965 703789 575623
output:
483248
result:
ok 1 number(s): "483248"
Test #15:
score: 0
Accepted
time: 748ms
memory: 34700kb
input:
1000000 394496 999983
output:
755554
result:
ok 1 number(s): "755554"
Test #16:
score: 0
Accepted
time: 751ms
memory: 34784kb
input:
1000000 24900 999451
output:
996185
result:
ok 1 number(s): "996185"
Test #17:
score: 0
Accepted
time: 748ms
memory: 34764kb
input:
999750 14190 999671
output:
191073
result:
ok 1 number(s): "191073"
Test #18:
score: 0
Accepted
time: 721ms
memory: 34384kb
input:
946312 10286 997741
output:
744939
result:
ok 1 number(s): "744939"
Test #19:
score: 0
Accepted
time: 762ms
memory: 34804kb
input:
997742 0 997741
output:
565729
result:
ok 1 number(s): "565729"
Test #20:
score: 0
Accepted
time: 755ms
memory: 34468kb
input:
977762 0 977761
output:
0
result:
ok 1 number(s): "0"