JOI2018-yo-3.cpp

#include <bits/stdc++.h>
 
using namespace std;
 
//#define int long long
#define FOR(i, j, k) for(int i = j; i < k; ++i)
#define rep(i, j) FOR(i, 0, j)
#define INF 1e9
#define LINF 1e18
#define fi first
#define se second
 
typedef unsigned long long ull;
typedef pair<int, int> P;
typedef pair<int, P> Pi;
typedef pair<P, P> PP;
 
const int MOD = 1e9 + 7;
const int dy[] = { 0, 0, 1, -1 };
const int dx[] = { 1, -1, 0, 0 };
 
template <class T> void chmin(T& a, const T& b) { a = min(a, b); }
template <class T> void chmax(T& a, const T& b) { a = max(a, b); }
 
int h, w;
int a[30][30];
 
signed main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
 
    cin >> h >> w;
    rep(i, h) rep(j, w) cin >> a[i][j];
    int res = INF;
    rep(i, h) rep(j, w) {
        int latte = 0;
        rep(k, h) rep(l, w) {
            latte += min(abs(i - k), abs(j - l)) * a[k][l];
        }
        chmin(res, latte);
    }
    cout << res << endl;
    return 0;
}