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 |
|---|---|---|---|---|---|---|---|---|---|
| #875457 | #10030. Grand Prix of Array Count | ship2077 | AC ✓ | 13ms | 19544kb | C++23 | 509b | 2025-01-29 20:15:48 | 2025-01-29 20:15:49 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
constexpr int M=2e6+5,mod=1e9+7;
long long n,k,ans,v[M];
int main(){
scanf("%lld%lld",&n,&k);
if (n==1) return printf("%lld\n",k%mod),0;
if (n==2||n&1) return printf("%lld\n",(k%mod)*(k%mod)%mod),0; n=k;
long long blk=sqrt(n),cnt=blk*2-(blk*(blk+1)>n);
for (int i=1;i<=blk;i++) v[i]=i,v[cnt+1-i]=n/i;
for (int i=1,p;i<=cnt;i++) p=v[cnt+1-i]%mod,ans=(ans+1ll*p*p%mod*(v[i]-v[i-1]))%mod;
printf("%lld\n",ans);
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3840kb
input:
5 2
output:
4
result:
ok 1 number(s): "4"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3840kb
input:
32 5
output:
32
result:
ok 1 number(s): "32"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
5 3
output:
9
result:
ok 1 number(s): "9"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
5 4
output:
16
result:
ok 1 number(s): "16"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
5 5
output:
25
result:
ok 1 number(s): "25"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
6 2
output:
5
result:
ok 1 number(s): "5"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3968kb
input:
6 3
output:
11
result:
ok 1 number(s): "11"
Test #8:
score: 0
Accepted
time: 1ms
memory: 3840kb
input:
6 4
output:
22
result:
ok 1 number(s): "22"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
6 5
output:
32
result:
ok 1 number(s): "32"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3968kb
input:
6 6
output:
52
result:
ok 1 number(s): "52"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
1000000000000 2
output:
5
result:
ok 1 number(s): "5"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
1000000000000 3
output:
11
result:
ok 1 number(s): "11"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
1000000000000 4
output:
22
result:
ok 1 number(s): "22"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
1000000000000 5
output:
32
result:
ok 1 number(s): "32"
Test #15:
score: 0
Accepted
time: 13ms
memory: 19536kb
input:
1000000000000 1000000000000
output:
840670140
result:
ok 1 number(s): "840670140"
Test #16:
score: 0
Accepted
time: 13ms
memory: 19544kb
input:
1000000000000 999999999999
output:
451060960
result:
ok 1 number(s): "451060960"
Test #17:
score: 0
Accepted
time: 1ms
memory: 3840kb
input:
999999999999 999999999999
output:
49014001
result:
ok 1 number(s): "49014001"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
999999999999 1000000000000
output:
49000000
result:
ok 1 number(s): "49000000"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
999999999999 2
output:
4
result:
ok 1 number(s): "4"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
999999999999 3
output:
9
result:
ok 1 number(s): "9"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
999999999999 4
output:
16
result:
ok 1 number(s): "16"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
999999999999 5
output:
25
result:
ok 1 number(s): "25"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
5 999999999999
output:
49014001
result:
ok 1 number(s): "49014001"
Test #24:
score: 0
Accepted
time: 11ms
memory: 19540kb
input:
6 999999999999
output:
451060960
result:
ok 1 number(s): "451060960"
Test #25:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
7 999999999999
output:
49014001
result:
ok 1 number(s): "49014001"
Test #26:
score: 0
Accepted
time: 13ms
memory: 19536kb
input:
8 999999999999
output:
451060960
result:
ok 1 number(s): "451060960"
Test #27:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
5 1000000000000
output:
49000000
result:
ok 1 number(s): "49000000"
Test #28:
score: 0
Accepted
time: 12ms
memory: 19540kb
input:
6 1000000000000
output:
840670140
result:
ok 1 number(s): "840670140"
Test #29:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
7 1000000000000
output:
49000000
result:
ok 1 number(s): "49000000"
Test #30:
score: 0
Accepted
time: 11ms
memory: 19536kb
input:
8 1000000000000
output:
840670140
result:
ok 1 number(s): "840670140"
Test #31:
score: 0
Accepted
time: 12ms
memory: 19408kb
input:
983302239554 983302239554
output:
62350851
result:
ok 1 number(s): "62350851"
Test #32:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
983302239553 983302239553
output:
384847475
result:
ok 1 number(s): "384847475"
Test #33:
score: 0
Accepted
time: 4ms
memory: 13448kb
input:
283302239554 283302239554
output:
579148388
result:
ok 1 number(s): "579148388"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
283302239553 283302239553
output:
289022341
result:
ok 1 number(s): "289022341"
Test #35:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
10000001 10000001
output:
19300001
result:
ok 1 number(s): "19300001"
Test #36:
score: 0
Accepted
time: 0ms
memory: 3968kb
input:
20000003 20000003
output:
117200009
result:
ok 1 number(s): "117200009"
Test #37:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
30000001 30000001
output:
53700001
result:
ok 1 number(s): "53700001"
Test #38:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
40000001 40000001
output:
68800001
result:
ok 1 number(s): "68800001"
Test #39:
score: 0
Accepted
time: 0ms
memory: 3840kb
input:
8 9
output:
115
result:
ok 1 number(s): "115"