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 |
---|---|---|---|---|---|---|---|---|---|
#526385 | #9167. Coprime Array | ucup-team1264 | AC ✓ | 0ms | 3808kb | C++20 | 2.2kb | 2024-08-21 14:56:18 | 2024-08-21 14:56:19 |
Judging History
answer
// https://www.youtube.com/watch?v=wthasN45KuY
// You said I’d fly away
// But my walls have kept me down
// Now I’m lost and I’m afraid
// And I’m close to hit the ground
//
// You said I’d fly away
// You said I’d fly anywhere
// But I keep on Falling
#ifndef ONLINE_JUDGE
#include "templates/debug.hpp"
#else
#define debug(...)
#endif
#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using u64 = uint64_t;
// return {gcd(a, b), x, y}.
// x, y is one solution of function ax + by = gcd(a, b);
array<i64, 3> exgcd(i64 a, i64 b) {
if (!b) return {a, 1, 0};
auto [g, x, y] = exgcd(b, a % b);
return {g, y, x - (a / b) * y};
}
// return {x, t} such that for all i, (x + i * t) * a % m = b
// return {-1, -1} if no solution exists.
pair<i64, i64> modEquation(i64 a, i64 b, i64 m) {
auto [g, t1, _] = exgcd(a, m);
if (b % g) return {-1, -1};
i64 x = (b / g) * t1 % (m / g);
if (x < 0) x += m / g;
return {x, m / g};
}
// return {r, m} such that x % r = m is equivalent to x % r1 = m1 and x % r2 = m2
// return {-1, -1} if no solution exists.
pair<i64, i64> excrtMerge(i64 r1, i64 m1, i64 r2, i64 m2) {
auto [d, t1, t2] = exgcd(m1, m2);
if ((r2 - r1) % d) return {-1, -1};
i64 m = m1 / d * m2;
i64 ans = (r1 + ((r2 - r1) / d) * t1 % m2 * m1) % m;
return {ans < 0 ? ans + m : ans, m};
}
// #define int i64
void solve() {
int s, x; cin >> s >> x;
if (gcd(s, x) == 1) {
cout << 1 << "\n";
cout << s << "\n";
return;
}
vector<int> ans;
if (s % 2 == 1 && x % 2 == 0) {
s--;
ans.push_back(1);
}
i64 r = 0, m = 1;
for (int i = 2; i * i <= x; i++) {
if (x % i == 0) {
while (x % i == 0) x /= i;
int j = 1;
while (j == s % i) j++;
tie(r, m) = excrtMerge(r, m, j, i);
}
}
ans.push_back(r); ans.push_back(s - r);
cout << ans.size() << "\n";
for (int x: ans) cout << x << " ";
}
#undef int
// Make bold hypotheses and verify carefully
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
int t = 1;
// cin >> t;
while (t--) {
solve();
}
}
这程序好像有点Bug,我给组数据试试?
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3524kb
input:
9 6
output:
3 1 1 7
result:
ok Correct
Test #2:
score: 0
Accepted
time: 0ms
memory: 3524kb
input:
14 34
output:
2 1 13
result:
ok Correct
Test #3:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
1000000000 223092870
output:
2 3233231 996766769
result:
ok Correct
Test #4:
score: 0
Accepted
time: 0ms
memory: 3532kb
input:
2 1000000000
output:
2 1 1
result:
ok Correct
Test #5:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
649557664 933437700
output:
2 83981 649473683
result:
ok Correct
Test #6:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
33396678 777360870
output:
2 1 33396677
result:
ok Correct
Test #7:
score: 0
Accepted
time: 0ms
memory: 3524kb
input:
48205845 903124530
output:
3 1 18811 48187033
result:
ok Correct
Test #8:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
251037078 505905400
output:
2 1 251037077
result:
ok Correct
Test #9:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
30022920 172746860
output:
2 1 30022919
result:
ok Correct
Test #10:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
63639298 808058790
output:
2 248711 63390587
result:
ok Correct
Test #11:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
76579017 362768406
output:
3 1 1 76579015
result:
ok Correct
Test #12:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
40423669 121437778
output:
3 1 1 40423667
result:
ok Correct
Test #13:
score: 0
Accepted
time: 0ms
memory: 3532kb
input:
449277309 720915195
output:
2 1 449277308
result:
ok Correct
Test #14:
score: 0
Accepted
time: 0ms
memory: 3808kb
input:
81665969 919836918
output:
3 1 2003 81663965
result:
ok Correct
Test #15:
score: 0
Accepted
time: 0ms
memory: 3540kb
input:
470578680 280387800
output:
2 1 470578679
result:
ok Correct
Test #16:
score: 0
Accepted
time: 0ms
memory: 3480kb
input:
58450340 803305503
output:
2 1 58450339
result:
ok Correct
Test #17:
score: 0
Accepted
time: 0ms
memory: 3540kb
input:
125896113 323676210
output:
3 1 59281 125836831
result:
ok Correct
Test #18:
score: 0
Accepted
time: 0ms
memory: 3528kb
input:
381905348 434752500
output:
2 1 381905347
result:
ok Correct
Test #19:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
78916498 653897673
output:
1 78916498
result:
ok Correct
Test #20:
score: 0
Accepted
time: 0ms
memory: 3776kb
input:
35787885 270845190
output:
3 1 1 35787883
result:
ok Correct
Extra Test:
score: 0
Extra Test Passed