Day19.cpp

class Solution {
public:
    int solve(vector<vector<int>>& img, int x, int y){
        int m = img.size();
        int n = img[0].size();
        int sum = 0;
        int count = 0;
        for(int i=-1;i<=1;++i){
            for(int j=-1;j<=1;++j){
                int nx = x+i;
                int ny = y+j;
                if(nx >= 0 && nx < m && ny >= 0 && ny < n){
                    sum += img[nx][ny];
                    ++count;
                }
            }
        }
        return sum/count;
    }
    vector<vector<int>> imageSmoother(vector<vector<int>>& img) {
        int m = img.size();
        int n = img[0].size();

        vector<vector<int>> ans(m, vector<int>(n,0));

        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                ans[i][j] = solve(img, i, j);
            }
        }
        return ans;
    }
};