QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#359828 | #8171. Cola | Delay_for_five_minutes# | AC ✓ | 236ms | 238108kb | C++20 | 1.3kb | 2024-03-20 21:34:59 | 2024-03-20 21:35:00 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int mod = 998244353;
int inv[20000005];
int n , m;
int t[20000005] , rt[20000005];
int fpow(int a,int b) {
int ans = 1;
while(b) {
if(b & 1) ans = 1LL * ans * a %mod;
a = 1LL * a * a %mod;b >>= 1;
}
return ans;
}
int C(int a,int b) {
return 1LL * t[a] * rt[b] % mod * rt[a - b] % mod;
}
int C_(int a,int b) {
return C(a + b - 1 , b) ;
}
int ans = 0;
typedef long long ll;
void calc(int s,int v) {
if(s > m - 1) return ;
// printf("%d %d\n",s,v) ;
int sol = C_(m - 1 - s + 1 , n) ;
// printf("SOL %d\n",sol) ;
ans = ((ll)ans + sol * v + mod) % mod;
}
int main() {
ios::sync_with_stdio(false) ; cin.tie(0) ;
cin >>n >> m ;
inv[1] = 1;rt[0] =rt[1] = 1;
t[0] = t[1] = 1;
for(int i = 2;i <= n + m + 2;i++) {
inv[i] = (1LL * inv[mod % i] * (mod - mod / i)) % mod;
rt[i] = 1LL * rt[i - 1] * inv[i] % mod;
t[i] = 1LL * t[i - 1] * i % mod;
}
for(int i = 0;1LL * i *(3*i - 1) / 2 <= m;i++) {
calc(i * (3 * i - 1) / 2 , ((i & 1) ? (-1) : 1)) ;
if(i) calc(i * (3 * i + 1) / 2 , ((i & 1) ? (-1) : 1)) ;
}
// cout << ans << '\n' ;
ans = 1LL * ans * rt[n ] % mod;
cout << ans;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 7780kb
input:
2 1
output:
499122177
result:
ok "499122177"
Test #2:
score: 0
Accepted
time: 1ms
memory: 7768kb
input:
1 1
output:
1
result:
ok "1"
Test #3:
score: 0
Accepted
time: 1ms
memory: 7780kb
input:
167 91
output:
469117530
result:
ok "469117530"
Test #4:
score: 0
Accepted
time: 214ms
memory: 229956kb
input:
9806463 8975779
output:
125384417
result:
ok "125384417"
Test #5:
score: 0
Accepted
time: 179ms
memory: 218788kb
input:
9138576 8731432
output:
306972756
result:
ok "306972756"
Test #6:
score: 0
Accepted
time: 195ms
memory: 233568kb
input:
9978791 9033584
output:
932159263
result:
ok "932159263"
Test #7:
score: 0
Accepted
time: 227ms
memory: 235956kb
input:
9811954 9790000
output:
404679920
result:
ok "404679920"
Test #8:
score: 0
Accepted
time: 208ms
memory: 231712kb
input:
9685105 9276909
output:
32996715
result:
ok "32996715"
Test #9:
score: 0
Accepted
time: 215ms
memory: 237980kb
input:
10000000 10000000
output:
309225852
result:
ok "309225852"
Test #10:
score: 0
Accepted
time: 210ms
memory: 238060kb
input:
10000000 9999999
output:
635234302
result:
ok "635234302"
Test #11:
score: 0
Accepted
time: 210ms
memory: 238036kb
input:
10000000 9999998
output:
239117935
result:
ok "239117935"
Test #12:
score: 0
Accepted
time: 186ms
memory: 238064kb
input:
10000000 9999997
output:
294859983
result:
ok "294859983"
Test #13:
score: 0
Accepted
time: 201ms
memory: 238108kb
input:
9999999 9999999
output:
305530110
result:
ok "305530110"
Test #14:
score: 0
Accepted
time: 225ms
memory: 238104kb
input:
9999999 9999998
output:
164959553
result:
ok "164959553"
Test #15:
score: 0
Accepted
time: 230ms
memory: 238044kb
input:
9999999 9999997
output:
532215262
result:
ok "532215262"
Test #16:
score: 0
Accepted
time: 203ms
memory: 238060kb
input:
9999999 9999996
output:
123628609
result:
ok "123628609"
Test #17:
score: 0
Accepted
time: 221ms
memory: 237972kb
input:
9999998 9999998
output:
223852357
result:
ok "223852357"
Test #18:
score: 0
Accepted
time: 218ms
memory: 238056kb
input:
9999998 9999997
output:
75877991
result:
ok "75877991"
Test #19:
score: 0
Accepted
time: 236ms
memory: 238064kb
input:
9999998 9999996
output:
494540335
result:
ok "494540335"
Test #20:
score: 0
Accepted
time: 209ms
memory: 238060kb
input:
9999998 9999995
output:
19191738
result:
ok "19191738"
Test #21:
score: 0
Accepted
time: 200ms
memory: 237988kb
input:
9999997 9999997
output:
238385746
result:
ok "238385746"
Test #22:
score: 0
Accepted
time: 215ms
memory: 238032kb
input:
9999997 9999996
output:
138191521
result:
ok "138191521"
Test #23:
score: 0
Accepted
time: 216ms
memory: 238068kb
input:
9999997 9999995
output:
721536184
result:
ok "721536184"
Test #24:
score: 0
Accepted
time: 223ms
memory: 237980kb
input:
9999997 9999994
output:
627112720
result:
ok "627112720"
Test #25:
score: 0
Accepted
time: 71ms
memory: 126452kb
input:
8113616 1826492
output:
629546539
result:
ok "629546539"
Test #26:
score: 0
Accepted
time: 96ms
memory: 144760kb
input:
7230333 4233627
output:
870135249
result:
ok "870135249"
Test #27:
score: 0
Accepted
time: 216ms
memory: 236036kb
input:
9734872 9617286
output:
780426509
result:
ok "780426509"
Test #28:
score: 0
Accepted
time: 105ms
memory: 162336kb
input:
6780022 6393958
output:
508662111
result:
ok "508662111"
Test #29:
score: 0
Accepted
time: 51ms
memory: 92280kb
input:
4986441 1909344
output:
762587564
result:
ok "762587564"
Test #30:
score: 0
Accepted
time: 83ms
memory: 126728kb
input:
9936540 91728
output:
651924678
result:
ok "651924678"
Test #31:
score: 0
Accepted
time: 82ms
memory: 119208kb
input:
9099529 94239
output:
775532638
result:
ok "775532638"
Test #32:
score: 0
Accepted
time: 70ms
memory: 119880kb
input:
9564814 93545
output:
474538902
result:
ok "474538902"
Test #33:
score: 0
Accepted
time: 54ms
memory: 122876kb
input:
9707744 92094
output:
354024226
result:
ok "354024226"
Test #34:
score: 0
Accepted
time: 93ms
memory: 119416kb
input:
9167687 94820
output:
858989558
result:
ok "858989558"
Test #35:
score: 0
Accepted
time: 93ms
memory: 126144kb
input:
10000000 100000
output:
609345536
result:
ok "609345536"
Test #36:
score: 0
Accepted
time: 74ms
memory: 126236kb
input:
10000000 99999
output:
217258255
result:
ok "217258255"
Test #37:
score: 0
Accepted
time: 80ms
memory: 126496kb
input:
10000000 99998
output:
485057696
result:
ok "485057696"
Test #38:
score: 0
Accepted
time: 80ms
memory: 126520kb
input:
10000000 99997
output:
193579142
result:
ok "193579142"
Test #39:
score: 0
Accepted
time: 75ms
memory: 126668kb
input:
9999999 100000
output:
584105896
result:
ok "584105896"
Test #40:
score: 0
Accepted
time: 94ms
memory: 126312kb
input:
9999999 99999
output:
707014865
result:
ok "707014865"
Test #41:
score: 0
Accepted
time: 69ms
memory: 126388kb
input:
9999999 99998
output:
872987417
result:
ok "872987417"
Test #42:
score: 0
Accepted
time: 91ms
memory: 126064kb
input:
9999999 99997
output:
707304988
result:
ok "707304988"
Test #43:
score: 0
Accepted
time: 87ms
memory: 125952kb
input:
9999998 100000
output:
789028925
result:
ok "789028925"
Test #44:
score: 0
Accepted
time: 89ms
memory: 129120kb
input:
9999998 99999
output:
628266237
result:
ok "628266237"
Test #45:
score: 0
Accepted
time: 95ms
memory: 127620kb
input:
9999998 99998
output:
38358057
result:
ok "38358057"
Test #46:
score: 0
Accepted
time: 80ms
memory: 129400kb
input:
9999998 99997
output:
785931240
result:
ok "785931240"
Test #47:
score: 0
Accepted
time: 68ms
memory: 127524kb
input:
9999997 100000
output:
945452715
result:
ok "945452715"
Test #48:
score: 0
Accepted
time: 62ms
memory: 129424kb
input:
9999997 99999
output:
537126025
result:
ok "537126025"
Test #49:
score: 0
Accepted
time: 88ms
memory: 125720kb
input:
9999997 99998
output:
837196653
result:
ok "837196653"
Test #50:
score: 0
Accepted
time: 86ms
memory: 126104kb
input:
9999997 99997
output:
263045713
result:
ok "263045713"
Test #51:
score: 0
Accepted
time: 0ms
memory: 7772kb
input:
2 2
output:
1
result:
ok "1"
Test #52:
score: 0
Accepted
time: 0ms
memory: 7736kb
input:
3 3
output:
831870295
result:
ok "831870295"
Test #53:
score: 0
Accepted
time: 1ms
memory: 7768kb
input:
4 4
output:
374341633
result:
ok "374341633"
Test #54:
score: 0
Accepted
time: 0ms
memory: 7752kb
input:
3 2
output:
499122177
result:
ok "499122177"
Test #55:
score: 0
Accepted
time: 0ms
memory: 7788kb
input:
4 3
output:
623902721
result:
ok "623902721"
Test #56:
score: 0
Accepted
time: 1ms
memory: 7756kb
input:
5 4
output:
890101215
result:
ok "890101215"
Test #57:
score: 0
Accepted
time: 1ms
memory: 7784kb
input:
3 1
output:
166374059
result:
ok "166374059"
Test #58:
score: 0
Accepted
time: 1ms
memory: 7784kb
input:
4 2
output:
166374059
result:
ok "166374059"
Test #59:
score: 0
Accepted
time: 1ms
memory: 7784kb
input:
5 3
output:
16637406
result:
ok "16637406"
Test #60:
score: 0
Accepted
time: 1ms
memory: 7764kb
input:
6 4
output:
508827330
result:
ok "508827330"
Test #61:
score: 0
Accepted
time: 1ms
memory: 7772kb
input:
4 1
output:
291154603
result:
ok "291154603"
Test #62:
score: 0
Accepted
time: 1ms
memory: 7768kb
input:
5 2
output:
291154603
result:
ok "291154603"
Test #63:
score: 0
Accepted
time: 1ms
memory: 7828kb
input:
6 3
output:
859599304
result:
ok "859599304"
Test #64:
score: 0
Accepted
time: 1ms
memory: 7832kb
input:
7 4
output:
694809760
result:
ok "694809760"
Test #65:
score: 0
Accepted
time: 43ms
memory: 75196kb
input:
5629201 38642
output:
327294391
result:
ok "327294391"
Test #66:
score: 0
Accepted
time: 0ms
memory: 12724kb
input:
126092 74219
output:
27573951
result:
ok "27573951"
Test #67:
score: 0
Accepted
time: 79ms
memory: 112952kb
input:
8593075 8689
output:
393785113
result:
ok "393785113"
Test #68:
score: 0
Accepted
time: 7ms
memory: 22332kb
input:
1076972 58637
output:
600806929
result:
ok "600806929"
Test #69:
score: 0
Accepted
time: 0ms
memory: 15312kb
input:
463217 39187
output:
408712022
result:
ok "408712022"
Extra Test:
score: 0
Extra Test Passed