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题解 | 小红统计区间（easy）

#include<bits/stdc++.h> #include <vector> using namespace std; using ll = long long; int main() { cin.tie(nullptr)->sync_with_stdi...

2026-02-23

0 13

题解 | qcjj寄快递

#include <bits/stdc++.h> #define endl '\n' using namespace std; using pdd = pair<double,double>; constexpr double eps = 1e-10; vector<p...

2026-02-19

0 10

题解 | 小红的数位删除

#include<bits/stdc++.h> #define inf 0x3fffffff #define endl '\n' using namespace std; int main() { cin.tie(nullptr)->sync_with_stdio(fal...

2026-02-17

1 13

题解 | #【模板】扩展巴什博弈#

#include<bits/stdc++.h> #define endl '\n' using namespace std; void solve() { int n,l,r; cin >> n >> l >> r; if(n...

2026-02-16

0 10

题解 | 相助(easy)

#include<bits/stdc++.h> #define INF 0x3fffffff #define endl '\n' using namespace std; void solve() { int n;cin >> n; vector<in...

2026-01-03

0 35

题解 | 先序遍历、中序遍历和后序遍历

#include<bits/stdc++.h> #define endl '\n' using namespace std; void dlr(int root); void ldr(int root); void lrd(int root); vector<vector<...

2026-01-01

0 41

题解 | 人人都是好朋友

#include<bits/stdc++.h> #define endl '\n' using namespace std; class dsu { vector<int> par; vector<int> rank; public: ...

2025-12-30

1 39

题解 | 小红的树上删边

#include <vector> #pragma GCC optimize(2) #include<bits/stdc++.h> #define endl '\n' #define INF 0x7fffffff #define _ << ' ' <<...

2025-12-27

0 35

题解 | 01串题

#include<bits/stdc++.h> #define endl '\n' using namespace std; void solve() { int a,b,x; cin >> a >> b >> x; if(x...

2025-12-18

0 33

题解 | 游游的字符重排

#include<bits/stdc++.h> #define endl '\n' using namespace std; int main() { string s;cin >> s; int len = s.length(); int ans ...

2025-12-03

0 26