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ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#777947 | #8339. Rooted Tree | Zeoy# | AC ✓ | 1104ms | 3680kb | C++20 | 1.2kb | 2024-11-24 11:33:46 | 2024-11-24 11:33:47 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
// #define int long long
using ll = long long;
const int mod = 1e9 + 9;
int add(int a, int b) {
int c = a + b;
if (c >= mod) c -= mod;
return c;
}
int sub(int a, int b) {
int c = a - b;
if (c < 0) c += mod;
return c;
}
int mul(int a, int b) {
ll c = 1ll * a * b;
if (c >= mod) c %= mod;
return c;
}
inline ll ksm(ll a, ll b) {
ll res = 1;
for (; b; b >>= 1) {
if (b & 1) {
res = res * a % mod;
}
a = a * a % mod;
}
return res;
}
inline ll inv(int x) {
return ksm(x, mod - 2);
}
inline ll frac(int x, int y) { // x / y (mod)
return 1ll * x * inv(y) % mod;
}
int m, k;
void solve() {
cin >> m >> k;
int all = 0, cnt = 1;
int res = 0, ans = 0;
for(int i = 1; i <= k; i++) {
int v = frac(all, cnt);
res = sub(all, v);
ans = add(v, ans);
all = add(res , mul((v + 1), m));
cnt += m - 1;
}
cout << add(all, ans) << endl;
}
/*
*/
signed main() {
ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
int T = 1;
// cin >> T;
while (T--) {
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3636kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3628kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 68ms
memory: 3600kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 745ms
memory: 3576kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 809ms
memory: 3672kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 454ms
memory: 3576kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1096ms
memory: 3604kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 202ms
memory: 3620kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 603ms
memory: 3680kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 356ms
memory: 3536kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 323ms
memory: 3584kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 948ms
memory: 3572kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1104ms
memory: 3580kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1103ms
memory: 3632kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1099ms
memory: 3588kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed