不可不戒

/* x=a+b+ab=(a+1)(b+1)-1 x=x1+x2+x1*x2=(a1+1)(b1+1)(a2+1)(b2+1)-1 x+1=(a+1)^x(b+1)^y; */ #include int main() { int n; while(scanf("%d",&n)!=EOF) { if(n==0) { printf("NO!\n"); cont

#include //f[i]=f[i-1]+2*f[i-2] int main() { int test,n,i; int ans[32]; ans[1]=1; ans[2]=3; for(i=3;i<=30;++i) ans[i]=ans[i-1]+2*ans[i-2]; scanf("%d",&test); while(test--) { scanf("%d",&n