likai2591 @ 2023-02-26 18:13:16
1.01s,非常极限
#include<bits/stdc++.h>
#define ull unsigned long long
#define ll long long
using namespace std;
int n,i,num;
int arr[14][14];
int c[14];
void printResult(){
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++)
if(arr[i][j]!=0)
cout<<j<<" ";
cout<<endl;
}
//若可以放置,则返回true
bool check(int r,int c){
//行、列肯定可以满足
//主对角线
int num=0;
int a=r,b=c;
while(a>=1&&b>=1){
num+=arr[a][b];
a--;b--;
}
if(num!=0)return false;
a=r,b=c;
while(a<=n&&b<=n){
num+=arr[a][b];
a++;b++;
}
if(num!=0)return false;
//副对角线
a=r,b=c;
while(a<=n&&b>=1){
num+=arr[a][b];
a++;b--;
}
if(num!=0)return false;
a=r,b=c;
while(a>=1&&b<=n){
num+=arr[a][b];
a--;b++;
}
if(num==0)return true;
else return false;
}
void search(int k){
if(k==n+1){
if(i<3){
printResult();
i++;
}
num++;
}else{
for(int j=1;j<=n;j++){
if(c[j]==0&&check(k,j)){//若满足规则可以放置
arr[k][j]=1;//放置
c[j]=1;
search(k+1);
arr[k][j]=0;//还原
c[j]=0;
}
}
}
}
int main(){
cin>>n;
search(1);
cout<<num;
return 0;
}
by Jorylee @ 2023-02-26 18:56:49
吸氧
by newtocpp @ 2023-04-27 22:29:57
@Jorylee 谢谢