UVA 1641 - ASCII Area

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <string>
#include <map>
#include <vector>
#include <set>
#include <queue>
#include <stack>
#include <cctype>
using namespace std;
#define ll long long
typedef unsigned long long ull;
#define maxn 110
#define INF 1<<30
int main (){
    int m,n;
    while(scanf("%d%d",&m,&n) != EOF){
        char s[maxn][maxn];
        for(int i = 0; i < m; i++){
            scanf("%s",s[i]);
        }
        double sum = 0;
        for(int i = 0; i < n; i++){
            int mod = 0;
            for(int j = 0; j < m; j++){
                if(s[j][i] == '/' || s[j][i] == '\\')
                    mod++;
                if(mod && s[j][i] == '/' || s[j][i] == '\\')
                    sum += 0.5;
                if(mod && s[j][i] == '.')
                    sum += 1;
                if(mod == 2)
                    mod = 0;
                 //   printf("%d %d %lf\n",i,j,sum);
            }
        }
        printf("%d\n",(int)sum);
    }
    return 0;
}