HDU 5538/ 2015长春区域 L.House Building 水题

题意：求给出图的表面积，不包括底面

///1085422276
#include<bits/stdc++.h>
using namespace std ;
typedef long long ll;
#define mem(a) memset(a,0,sizeof(a))
#define meminf(a) memset(a,127,sizeof(a));
#define TS printf("111111\n");
#define FOR(i,a,b) for( int i=a;i<=b;i++)
#define FORJ(i,a,b) for(int i=a;i>=b;i--)
#define READ(a,b,c) scanf("%d%d%d",&a,&b,&c)
#define inf 100000
inline ll read()
{
    ll x=0,f=1;
    char ch=getchar();
    while(ch<‘0‘||ch>‘9‘)
    {
        if(ch==‘-‘)f=-1;
        ch=getchar();
    }
    while(ch>=‘0‘&&ch<=‘9‘)
    {
        x=x*10+ch-‘0‘;
        ch=getchar();
    }
    return x*f;
}
//****************************************
#define maxn 100+5
int ss[4][2]={-1,0, 0,-1, 1,0, 0,1};
int a[maxn][maxn],n,m;
bool check(int x,int y){
if(x<=0||y<=0||x>n||y>m)return 1;
else return 0;
}
int main(){

   int T;
   scanf("%d",&T);
   while(T--){
        mem(a);
       ll sum=0;
        ll tmp=0;
       ll ans=0;
    scanf("%d%d",&n,&m);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            scanf("%d",&a[i][j]);
            if(a[i][j])
            tmp=tmp+(a[i][j]-1);
            sum+=a[i][j];
            if(a[i][j])ans++;
        }
    }
    sum*=6;
   sum-=ans;
   ans=0;

    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
                if(a[i][j]!=0)
            for(int k=0;k<4;k++){
                int xx=i+ss[k][0];
                int yy=j+ss[k][1];
                if(check(xx,yy))continue;
                if(a[xx][yy]) {ans+=(min(a[i][j],a[xx][yy]));}
            }
        }
    }
  //  cout<<sum<<endl;
  //cout<<ans/2+tmp<<endl;
     ans/=2;
    ans+=tmp;
    ans*=2;
    //cout<<ans<<endl;
    sum=sum-ans;
    printf("%I64d\n",sum);
   }
  return 0;
}

代码