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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 |
---|---|---|---|---|---|---|---|---|---|
#876129 | #7704. Plus Minus Four Squares | LaVuna47# | AC ✓ | 38ms | 3712kb | C++20 | 2.1kb | 2025-01-30 17:31:18 | 2025-01-30 17:31:18 |
Judging History
answer
//A tree without skin will surely die.
//A man without face is invincible.
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(S) ((int)S.size())
#define FOR(i, st_, n) for(int i = st_; i < n; ++i)
#define RFOR(i, n, end_) for(int i = (n)-1; i >= end_; --i)
#define x first
#define y second
#define pb push_back
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef unsigned long long ull;
typedef long double LD;
typedef pair<ull, ull> pull;
using namespace __gnu_pbds;
typedef tree<ll, null_type, less<>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
using namespace std;
#ifdef ONPC
mt19937 rnd(228);
#else
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
#endif
const ll MAX_SQ = 72;
// 36 36 -4 -4
vector<ll> nums;
bool ok()
{
FOR(i,1,4)
{
if(abs(nums[i]) == abs(nums[i-1]) && nums[i] != nums[i-1])
return false;
}
return nums[0] >= 0;
}
ll f(ll num, ll prev, int k)
{
if(k==0)
{
if(num==0 && ok())
{
//for(auto item: nums)
//cout<<item<<" ";
//cout<<'\n';
return 1;
}
return 0;
}
ll res=0;
// add;
for(ll i = 0; i*i <= abs(prev); ++i)
{
nums.pb({i*i});
res += f(num-i*i, i*i,k-1);
nums.pop_back();
}
for(ll i = 1; i*i <= abs(prev); ++i)
{
nums.pb({-i*i});
res += f(num+i*i, i*i,k-1);
nums.pop_back();
}
return res;
}
int solve()
{
ll n;
if(!(cin>>n))return 1;
cout<<f(n,n,4)<<'\n';
return 0;
}
int32_t main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int TET = 1e9;
//cin >> TET;
for (int i = 1; i <= TET; i++)
{
if (solve())
{
break;
}
#ifdef ONPC
cout << "__________________________" << endl;
#endif
}
#ifdef ONPC
cerr << endl << "finished in " << clock() * 1.0 / CLOCKS_PER_SEC << " sec" << endl;
#endif
}
詳細信息
Test #1:
score: 100
Accepted
time: 1ms
memory: 3712kb
input:
64
output:
12
result:
ok single line: '12'
Test #2:
score: 0
Accepted
time: 1ms
memory: 3712kb
input:
65
output:
10
result:
ok single line: '10'
Test #3:
score: 0
Accepted
time: 7ms
memory: 3712kb
input:
2023
output:
245
result:
ok single line: '245'
Test #4:
score: 0
Accepted
time: 1ms
memory: 3712kb
input:
0
output:
1
result:
ok single line: '1'
Test #5:
score: 0
Accepted
time: 38ms
memory: 3584kb
input:
5000
output:
951
result:
ok single line: '951'
Test #6:
score: 0
Accepted
time: 2ms
memory: 3584kb
input:
1024
output:
182
result:
ok single line: '182'
Test #7:
score: 0
Accepted
time: 7ms
memory: 3584kb
input:
2048
output:
355
result:
ok single line: '355'
Test #8:
score: 0
Accepted
time: 28ms
memory: 3712kb
input:
4096
output:
708
result:
ok single line: '708'
Test #9:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
1
output:
1
result:
ok single line: '1'
Test #10:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
2
output:
1
result:
ok single line: '1'
Test #11:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
4
output:
2
result:
ok single line: '2'
Test #12:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
3
output:
1
result:
ok single line: '1'
Test #13:
score: 0
Accepted
time: 2ms
memory: 3712kb
input:
1111
output:
131
result:
ok single line: '131'