QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #657476 | #7735. Primitive Root | mitthu | WA | 20ms | 3832kb | C++17 | 597b | 2024-10-19 14:49:59 | 2024-10-19 14:49:59 |
Judging History
answer
#include<bits/stdc++.h>
#define ull unsigned long long
using namespace std;
int T;
ull p, m;
ull F(ull x){
return (1ULL + p * x) ^ (p - 1);
}
void solve(){
cin >> p >> m;
ull ans = 0;
for (ull i = 0; i <= 10; i++) if(F(i) <= m)ans++;
if (F(11) <= m){
ull l = 11, r = m/p + 20;
while(l < r){
ull mid = (l + r + 1) / 2;
if(F(mid) <= m) l = mid;
else r = mid - 1;
}
ans += l - 10;
}
cout<<ans<<endl;
}
int main(){
scanf("%d", &T);
for (; T; T--)solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3632kb
input:
3 2 0 7 11 1145141 998244353
output:
1 2 872
result:
ok 3 lines
Test #2:
score: -100
Wrong Answer
time: 20ms
memory: 3832kb
input:
47595 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 2 15 2 16 2 17 2 18 2 19 2 20 2 21 2 22 2 23 2 24 2 25 2 26 2 27 2 28 2 29 2 30 2 31 2 32 2 33 2 34 2 35 2 36 2 37 2 38 2 39 2 40 2 41 2 42 2 43 2 44 2 45 2 46 2 47 2 48 2 49 2 50 2 51 2 52 2 53 2 54 2 55 2 56 2 57 2 58 2 59 2 60...
output:
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 ...
result:
wrong answer 543rd lines differ - expected: '14', found: '13'