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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 |
---|---|---|---|---|---|---|---|---|---|
#546595 | #7704. Plus Minus Four Squares | Olegpresnyakov# | AC ✓ | 38ms | 3648kb | C++17 | 1.3kb | 2024-09-04 10:00:48 | 2024-09-04 10:00:50 |
Judging History
answer
#include <iostream>
#include <vector>
#include <cmath>
#include <string>
#include <algorithm>
#include <set>
#include <map>
#include <fstream>
#include <time.h>
#include <unordered_map>
#include <cstdlib>
#include <string.h>
#include <bitset>
#include <unordered_set>
#include <cstdlib>
#include <string.h>
#include <cassert>
#define all(a) (a).begin(), (a).end()
#define int long long
using namespace std;
vector<int> sq;
int glob = 0;
void dfs(int n, int sum, int index, int step, int prelast, int last){
if(step == 4){
return;
}
if(prelast != last){
index--;
}
for(int i = index; i >= 1; --i){
int new_el = sum - last * sq[i];
//cerr << new_el << "\n";
if(sum - last * sq[i] == n){
glob++;
}
dfs(n, new_el, i, step + 1, last, -1);
dfs(n, new_el, i, step + 1, last, 1);
}
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n;
cin >> n;
sq.clear();
for(int i = 0; i * i <= n; ++i){
sq.push_back(i * i);
}
if(n == 0){
cout << "1\n";
return 0;
}
dfs(n, 0, sq.size() - 1, 0, -1, -1);
cout << glob << "\n";
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3608kb
input:
64
output:
12
result:
ok single line: '12'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
65
output:
10
result:
ok single line: '10'
Test #3:
score: 0
Accepted
time: 3ms
memory: 3632kb
input:
2023
output:
245
result:
ok single line: '245'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
0
output:
1
result:
ok single line: '1'
Test #5:
score: 0
Accepted
time: 38ms
memory: 3552kb
input:
5000
output:
951
result:
ok single line: '951'
Test #6:
score: 0
Accepted
time: 2ms
memory: 3580kb
input:
1024
output:
182
result:
ok single line: '182'
Test #7:
score: 0
Accepted
time: 7ms
memory: 3644kb
input:
2048
output:
355
result:
ok single line: '355'
Test #8:
score: 0
Accepted
time: 27ms
memory: 3624kb
input:
4096
output:
708
result:
ok single line: '708'
Test #9:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
1
output:
1
result:
ok single line: '1'
Test #10:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
2
output:
1
result:
ok single line: '1'
Test #11:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
4
output:
2
result:
ok single line: '2'
Test #12:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
3
output:
1
result:
ok single line: '1'
Test #13:
score: 0
Accepted
time: 2ms
memory: 3648kb
input:
1111
output:
131
result:
ok single line: '131'