PAT a1089题解

#include 
#include 
using namespace std;
const int N = 111;
int origin[N], tempOri[N], changed[N];
int n;

bool isSame(int A[], int B[]){
	for(int i = 0; i < n; i++){
		if(A[i] != B[i]) return false;
	} 
	return true;
}

bool showArray(int A[]){
	for(int i = 0; i < n; i++){
		printf("%d", A[i]);
		if(i < n - 1) printf(" ");
	}
	printf("\n");
}

bool insertSort(){
	bool flag = false;
	for(int i = 1; i < n; i++){
		if(i != 1 && isSame(tempOri, changed)){
			flag = true;
		}
		int temp = tempOri[i], j = i;
		while(j > 0 && tempOri[j - 1] > temp){
			tempOri[j] = tempOri[j - 1];
			j--;
		}
		tempOri[j] = temp;
		if(flag == true){
			return true;
		}
	}
	return false;
}

void mergeSort(){
	bool flag = false;
	for(int step = 2; step / 2 <= n; step *= 2){
		if(step != 2 && isSame(tempOri, changed)){
			flag = true;
		}
		for(int i = 0; i < n; i += step){
			sort(tempOri + i, tempOri + min(i + step, n));
		}
		if(flag == true){
			showArray(tempOri);
			return;
		}
	}
} 

int main(){
	scanf("%d", &n);
	for(int i = 0; i < n; i++){
		scanf("%d", &origin[i]);
		tempOri[i] = origin[i];
	}
	for(int i = 0; i < n; i++){
		scanf("%d", &changed[i]);
	}
	if(insertSort()){
		printf("Insertion Sort\n");
		showArray(tempOri);
	}
	else{
		printf("Merge Sort\n");
		for(int i = 0; i < n; i++){
			tempOri[i] = origin[i];
		}
		mergeSort();
	}
	return 0;
}