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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#607758 | #8339. Rooted Tree | SYease | AC ✓ | 1126ms | 3728kb | C++17 | 2.2kb | 2024-10-03 16:08:52 | 2024-10-03 16:08:52 |
Judging History
answer
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <algorithm>
#include <string>
#include <cstring>
#include <queue>
#include <map>
#include <vector>
#include <unordered_map>
#include <set>
#include <cmath>
#include <unordered_set>
#include <iomanip>
#include <stdio.h>
#include <queue>
#define int long long
//#define int __int128
using namespace std;
#define endl '\n'
#define F first
#define S second
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<string, int> psi;
const int N = 1e6 + 10;
const int mod = 1e9+9;
const int M = 8;
const int MAXN = 1e6;
//读入
inline int read() {
int x = 0, f = 1; char ch = getchar();
while (ch > '9' || ch < '0') { if (ch == '-')f = -1; ch = getchar(); }
while (ch >= '0' && ch <= '9') { x = x * 10 + ch - '0'; ch = getchar(); }
return x * f;
}
//打印
inline void write(int x) {
if (x < 0) { putchar('-'); x = -x; }
if (x > 9)write(x / 10);
putchar(x % 10 + '0');
}
ll ksm(ll m,ll k,ll mod)
{
ll ans=1;
ll t=m;//通过t来预处理m的二次方幂
while(k){
if(k&1) ans=ans*t%mod;//判断k的二进制末位是否为1,相当于k%=2
t=t*t%mod;//预处理
k>>=1;//将k的二进制位右移相当于k/=2
}
return ans;
}
int phi(int a)
{
int res=a;
for(int i=2;i<=a/i;i++){
if(a%i==0){
res = res/i*(i-1);
while(a%i==0) a/=i;
}
}
if(a>1) res = res / a * (a - 1);
return res;
}
void exgcd(int a,int b,int &x,int &y)
{
if(b==0){
x=1,y=0;
return;
}
exgcd(b,a%b,y,x);//由于是使用指针传输,故可以在这里就交换x,y
y-=(a/b)*x;//x,y已交换
}
int gcd(int a,int b)
{
return b==0?a:gcd(b,a%b);
}
vector<int> a;
map<int,int> mp;
vector<int> ans;
void solve()
{
int m,k;
cin>>m>>k;
int num=1;
int sum=0;
int ans=0;
int ping=0;
for(int i=1;i<=k;i++){
ans=(ans+(ping+1)*m)%mod;
sum=(((sum-ping)+(ping+1)*m)%mod+mod)%mod;
num=(num+m-1)%mod;
ping=sum*ksm(num,mod-2,mod)%mod;
}
cout<<ans<<endl;
}
signed main()
{
std::ios::sync_with_stdio(false);//
std::cin.tie(0);
int tc;
//fac_init(mod);
tc = 1;
//cin >> tc;
//scanf("%lld",&tc);
while (tc--) {
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3720kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 70ms
memory: 3724kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 755ms
memory: 3604kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 821ms
memory: 3664kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 462ms
memory: 3660kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1115ms
memory: 3724kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 203ms
memory: 3728kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 610ms
memory: 3584kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 357ms
memory: 3724kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 329ms
memory: 3684kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 969ms
memory: 3608kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1126ms
memory: 3664kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1126ms
memory: 3672kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1122ms
memory: 3608kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed