#include <iostream>

 #include <cstdio>

 #include <cstring>

 #include <string>

 #include <algorithm>

 #include <cmath>

 #include <vector>

 #include <queue>

 #include <map>

 #include <stack>

 #include <set>

 using namespace std;

 typedef long long LL;

 typedef unsigned long long uLL;

 #define ms(a, b) memset(a, b, sizeof(a))

 #define pb push_back

 #define mp make_pair

 #define eps 0.0000000001

 #define IOS ios::sync_with_stdio(0);cin.tie(0);

 const LL INF = 0x3f3f3f3f3f3f3f3f;

 const int inf = 0x3f3f3f3f;

 const int maxn = +;

 const int mod = 1e9+;

 char s[maxn][maxn];

 int main() {

 #ifdef LOCAL

     freopen("input.txt", "r", stdin);

 //    freopen("output.txt", "w", stdout);

 #endif

 //    IOS

     freopen("ascii.in", "r", stdin);

     freopen("ascii.out", "w", stdout);

     int h, w;

     scanf("%d%d", &h, &w);

     for(int i = ;i<h;i++)  scanf("%s", s[i]);

     double ans = ;

     for(int i = ;i<h;i++){

         int flag = ;

         for(int j = ;j<w;j++){

             if((s[i][j]=='/'||s[i][j]=='\\')&&flag==){

                 flag = ;

                 ans += 0.5;

             }

             else if(s[i][j]=='.'&&flag){

                 ans+=1.0;

             }

             else if((s[i][j]=='/'||s[i][j]=='\\')&&flag){

                 flag = ;

                 ans += 0.5;

             }

         }

 //        printf("%.0f\n", ans);

     }

     printf("%.0f\n", ans);

     return ;

 }