```cpp #include using namespace std; int main () { int a , s = 1; cin >> a; int k[a - 1]; for (int g = 0 ; g > k[g]; } for (int t = 0 ; t <= a -1 ; t++){ s *= k…

```cpp #include using namespace std ; int main () { int k; cin >> k; int a[48] ; a[1] = a[0] = 1; for (int i = 2 ; i <= k ; i++) a[i] = a[i-1] + a[i-2]; cout <<…

```cpp #include using namespace std; int main () { int a ; cin >> a; cout << ((1 + a) * a)/2; return 0; } ``` 解1 +_ 2 + 3 + ... + a = ((1 + a) * a )/2

```cpp #include using namespace std; int V = 1e6 + 10; int main() { string a; cin >> a; int z[V]; for (int i = 0 ; i = '0' && a[i] <= '9') z[++i] = a[i] - '0';…

在讨论《求改》回复：

@[ray2060](luogu://user/476343) 谢谢QaQ

```cpp #include using namespace std ; int main () { int a , b ; cin >> a >> b; double c = a + b / 10.0; for (int i = 0 ; i * 1.9 > c; i++ ) cout << i - 1; retur…

#include using namespace std ; float a[3] , b = 0 ;#include ```cpp #include using namespace std ; float a[3] , b = 0 ; int main () { cin >> a[0] >> a[1] >> a[2]…