ustcyue的专栏

不多说，上代码 #include #include using namespace std; int a[30]; void getTaozi() { a[0] =1; for(int i=1;i<30;++i) { a[i] = (a[i-1]+1)<<1; } } int main() { int n; getTaozi(); while(scanf("%d",&n)

#include #include using namespace std; int a[466]; void getSanjiao() { a[2] = a[1] = a[0] = 1; for(int i =3;i<=30;++i) { int left = (1+i-1)*(i-1)/2; int bleft = left-i+1; int pos = left; a