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uva 11085

暴力試看看
竟然AC了~

[sourcecode language="cpp"]
//============================================================================
// Name : Back to the 8-Queens.cpp
// Date : 2013 2013/2/21 下午11:22:54
// Author : GCA
//============================================================================
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <climits>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <cctype>
#include <utility>
using namespace std;
typedef long long ll;
typedef unsigned int uint;
#define Set(a,s) memset(a,s,sizeof(a))
#define Write(w) freopen(w,"w",stdout)
#define Read(r) freopen(r,"r",stdin)
#define Pln() printf("\n")
#define I_de(x,n)for(int i=0;i<n;i++)printf("%d ",x[i]);Pln()
#define De(x)printf(#x"%d\n",x)
#define For(i,x)for(int i=0;i<x;i++)
#define CON(x,y) x##y
#define Pmz(dp,nx,ny)for(int hty=0;hty<ny;hty++){for(int htx=0;htx<nx;htx++){\
printf("%d ",dp[htx][hty]);}Pln();}
#define M 100005
#define PII pair<int,int>
#define PB push_back
#define oo INT_MAX
#define Set_oo 0x3f
#define Is_debug true
#define debug(...) if(Is_debug)printf("DEBUG: "),printf(__VA_ARGS__)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define eps 1e-6
bool xdy(double x,double y){return x>y+eps;}
bool xddy(double x,double y){return x>y-eps;}
bool xcy(double x,double y){return x<y-eps;}
bool xcdy(double x,double y){return x<y+eps;}
int min3(int x,int y,int z){
int tmp=min(x,y);
return min(tmp,z);
}
int max3(int x,int y,int z){
int tmp=max(x,y);
return max(tmp,z);
}
int used[8];
int lslive[8][8];
int rslive[8][8];
int apos[500][8],pos[8];
int tt=0;
void rec(int x,int depth){
if(x>=8){
for(int i=0;i<8;i++){
// printf("%d",pos[i]);
apos[tt][i]=pos[i];
}
tt++;
// Pln();
return;
}
for(int i=0;i<8;i++){
if(!used[i]&&!rslive[x][i]&&!lslive[x][i]){
used[i]=1;
for(int j=i,k=x;j<8&&k<8;j++,k++){
rslive[k][j]=1;
}
for(int j=i,k=x;j>=0&&k<8;j--,k++){
lslive[k][j]=1;
}
pos[x]=i;
//I_de(used,8);
//printf("<<< depth%d pos[%d][%d]=%d\n",depth,tt,x,pos[tt][x]);
rec(x+1,depth+1);
used[i]=0;
for(int j=i,k=x;j<8&&k<8;j++,k++){
rslive[k][j]=0;
}
for(int j=i,k=x;j>=0&&k<8;j--,k++){
lslive[k][j]=0;
}
}
}
}
void get8q(){
Set(used,0);
Set(lslive,0);
Set(rslive,0);
rec(0,0);
}
int main() {
ios_base::sync_with_stdio(0);
get8q();
int x[8],ff=0;
while(~scanf("%d%d%d%d%d%d%d%d",&x[0],&x[1],&x[2],&x[3],&x[4],&x[5],&x[6],&x[7])){
int minn=oo;
for(int i=0;i<tt;i++){
int ans=0;
for(int j=0;j<8;j++){
if(x[j]!=(apos[i][j]+1))ans++;
}
minn=min(ans,minn);
}
printf("Case %d: %d\n",++ff,minn);
}

}

[/sourcecode]