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2019-12-21 19:47:00
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#include<bits/stdc++.h>
namespace ZDY{
    #pragma GCC optimize(3)
    #define il __inline__ __attribute__ ((always_inline))
    #define rg register
    #define ll long long
    #define ull unsigned long long
    #define db double
    #define sht short
    #define MB template <class T>il
    #define Fur(i,x,y) for(int i(x);i<=y;++i)
    #define Fdr(i,x,y) for(int i(x);i>=y;--i)
    #define fl(i,x) for(int i(head[x]),to;to=e[i].to,i;i=e[i].nxt)
    #define clr(x,y) memset(x,y,sizeof(x))
    #define cpy(x,y) memcpy(x,y,sizeof(x))
    #define fin(s) freopen(s".in","r",stdin)
    #define fout(s) freopen(s".out","w",stdout)
    #define fcin ios::sync_with_stdio(false)
    #define l2(n) ((int)(log2(n)))
    #define inf 2122219134
    MB T ABS(T x){return x>0?x:-x;}
    MB T MAX(T x,T y){return x>y?x:y;}
    MB T MIN(T x,T y){return x<y?x:y;}
    MB T GCD(T x,T y){return y?GCD(y,x%y):x;}
    MB void SWAP(T &x,T &y){T t=x;x=y;y=t;}
}using namespace ZDY;using namespace std;
namespace IO{const int str=1<<20;static char in_buf[str],*in_s,*in_t;bool __=0;il char gc(){return (in_s==in_t)&&(in_t=(in_s=in_buf)+fread(in_buf,1,str,stdin)),in_s==in_t?EOF:*in_s++;}il void in(string &ch){ch.clear();if(__)return;rg char c;while((c=gc())!=EOF&&isspace(c));if(c==EOF){__=1;return;}ch+=c;while((c=gc())!=EOF&&!isspace(c))ch+=c;if(c==EOF)__=1;}il void in(char &ch){if(__)return;rg char c;while((c=gc())!=EOF&&isspace(c));if(c==EOF)__=1;else ch=c;}il void in(char *ch){*ch='\0';if(__)return;rg char c;while((c=gc())!=EOF&&isspace(c));if(c==EOF){__=1;return;}*ch=c;ch++;while((c=gc())!=EOF&&!isspace(c))*ch=c,ch++;if(c==EOF)__=1;*ch='\0';}template<typename T>il void in(T &x){if(__)return;rg char c=gc();bool f=0;while(c!=EOF&&(c<'0'||c>'9'))f^=(c=='-'),c=gc();if(c==EOF){__=1;return;}x=0;while(c!=EOF&&'0'<=c&&c<='9')x=x*10+c-48,c=gc();if(c==EOF)__=1;if(f)x=-x;}template<typename T,typename ... arr>il void in(T &x,arr & ... y){in(x),in(y...);}const char ln='\n';static char out_buf[str],*out_s=out_buf,*out_t=out_buf+str;il void flush(){fwrite(out_buf,1,out_s-out_buf,stdout);out_s=out_buf;}il void pt(char c){(out_s==out_t)?(fwrite(out_s=out_buf,1,str,stdout),*out_s++=c):(*out_s++=c);}il void out(const char* s){while(*s)pt(*s++);}il void out(char* s){while(*s)pt(*s++);}il void out(char c){pt(c);}il void out(string s){for(int i=0;s[i];i++)pt(s[i]);}template<typename T>il void out(T x){if(!x){pt('0');return;}if(x<0)pt('-'),x=-x;char a[50],t=0;while(x)a[t++]=x%10,x/= 10;while(t--)pt(a[t]+'0');}template<typename T,typename ... arr>il void out(T x,arr & ... y){out(x),out(y...);}}using namespace IO;
#define N 100011
int a[10][10],bl[10][10];
bool h[10][10],l[10][10],block[10][10];
int belong(int x,int y){
    int p=(x-1)/3+1,q=(y-1)/3+1;
    return (p-1)*3+q;
}
void add(int i,int j,int k){
    l[i][k]^=1;
    h[j][k]^=1;
    block[bl[i][j]][k]^=1;
}
il bool chk(int x,int y,int k){
    return !(l[x][k]||h[y][k]||block[bl[x][y]][k]);
}
int ans=-1;
il int point(int i,int j){
    if(i==1||j==1||i==9||j==9)return 6;
    if(i==2||j==2||i==8||j==8)return 7;
    if(i==3||j==3||i==7||j==7)return 8;
    if(i==4||j==4||i==6||j==6)return 9;
    return 10;
}
il void op(){
    int res=0;
    Fur(i,1,9)Fur(j,1,9)res+=a[i][j]*point(i,j);
    ans=MAX(ans,res);
}
void fil();
void dfs(int x,int y){
    if(a[x][y]){
        if(x==9&&y==9){op();return;}
        if(y==9)dfs(x+1,1);
        else dfs(x,y+1);
    }
    else
    Fdr(i,9,1)
    if(chk(x,y,i)){
        a[x][y]=i;
        add(x,y,i);
        if(x==9&&y==9){op();return;}
        if(y==9)dfs(x+1,1);
        else dfs(x,y+1);
        add(x,y,i);
        a[x][y]=0;
    }
}
int main(){
    Fur(i,1,9)
        Fur(j,1,9)
        bl[i][j]=belong(i,j);

    Fur(i,1,9)  
        Fur(j,1,9){
            cin>>a[i][j];
            if(a[i][j])add(i,j,a[i][j]);
        }

    dfs(1,1);

    cout<<ans<<endl;
}
LG 1074 靶形数独
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