> #include <iostream.h>
> 
> void makeTree(int n){
> 	int i, j, sum, m;
> 	int a[19] = {0, 1, 3, 8, 22, 64, 196, 625, 2055, 6917, 23713, 82499, 290511, 1033411,
> 		   3707851, 13402696, 48760366, 178405156, 500000001};
> 	if(n == 0);
> 	else if(n == 1){ cout << 'X';}
> 	else if(n == 2){ cout << "X(X)";}
> 	else if(n == 3){ cout << "(X)X";}
> 	else if(n == 4){ cout << "X(X(X))";}
> 	else if(n == 5){ cout << "X((X)X)";}
> 	else if(n == 6){ cout << "(X)X(X)";}
> 	else if(n == 7){ cout << "(X(X))X";}
> 	else if(n == 8){ cout << "((X)X)X";}
> 	else{
> 		for(i=2; i<19; ++i){
> 			if(a[i] <n && a[i+1]>=n) m= i+1;
> 		}
> 		if(n <=(2*a[m-1]-a[m-2])){
> 			cout<<"X(";
> 			makeTree(n-a[m-1]+a[m-2]);
> 			cout<<')';
> 		}else if((n>a[m]+a[m-2]-a[m-1]) && n<=a[m]){
> 			cout<<'(';
> 			makeTree(a[m-1]-a[m]+n);
> 			cout <<")X";
> 		}else{
> 			sum =2*a[m-1] - a[m-2];
> 			for(i=1; i<m; ++i){
> 				if(n>sum+(a[i]-a[i-1])*(a[m-i-1]-a[m-i-2])){
> 					sum +=(a[i]-a[i-1])*(a[m-i-1]-a[m-i-2]);
> 				}else break;
> 			}
> 			j=1;
> 			while((sum+j*(a[m-i-1]-a[m-i-2]))<n) j++;
> 			cout<<'(';
> 			makeTree(j+a[i-1]);
> 			cout << ")X(";
> 			makeTree(n-sum-(j-1)*(a[m-i-1]-a[m-i-2])+a[m-i-2]);
> 			cout <<")";
> 		}
> 	}
> }
> 
> int main(void){
> 	int n;
> 	cin >> n;
> 	while(n != 0){
> 		makeTree(n);
> 		cout << endl;
> 		cin >> n;
> 	}
> 	return 0;
> }

• Re:将那a[18]改成 656043856 ,不通过找我 (1685) wotiannu 2009-01-13 22:29:13