洛谷 三月月赛 A

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 inline int ra()
 4 {
 5     int x=0,f=1; char ch=getchar();
 6     while (ch<‘0‘ || ch>‘9‘) {if (ch==‘-‘) f=-1; ch=getchar();}
 7     while (ch>=‘0‘ && ch<=‘9‘) {x=x*10+ch-‘0‘; ch=getchar();}
 8     return x*f;
 9 }
10 bool mp[105][105];
11 int n,m,k,ans,tot;
12 int main()
13 {
14     n=ra(); m=ra(); k=ra();
15     for (int i=1; i<=n; i++)
16     {
17         char ch[105];
18         scanf("%s",ch+1);
19         for (int j=1; j<=m; j++)
20             if (ch[j]==‘.‘) mp[i][j]=1,tot++;
21     }    
22     if (k==1) 
23     {
24         cout<<tot<<endl;
25         return 0;
26     }
27     for (int i=1; i<=n; i++)
28     {
29         int last=0;
30         for (int j=1; j<=m+1; j++)
31             if (!mp[i][j]) ans+=max(last-k+1,0),last=0;
32             else last++;
33     }
34     for (int j=1; j<=m; j++)    
35     {
36         int last=0;
37         for (int i=1; i<=n+1; i++)
38             if (!mp[i][j]) ans+=max(last-k+1,0),last=0;
39             else last++;
40     }
41     cout<<ans<<endl;
42     return 0;
43 }