B. Polo the Penguin and Matrix：题目

思路：纯暴力

#include <bits/stdc++.h>
using namespace std;
// #define int long long
vector<int> a((int)6e5);
vector<int> b((int)6e5), c((int)6e5);
const int mod = 1e9 + 7;
int g[111][111];
signed main()
{int n, m, d;cin >> n >> m >> d;for (int i = 1; i <= n; i++){for (int j = 1; j <= m; j++){cin >> g[i][j];}}int sum = 0x3f3f3f3f;for (int i = 1; i <= 10000; i ++){int h = i;int ff = 1;int res = 0;for (int k = 1; k <= n; k++){for (int kk = 1; kk <= m; kk++){int cha = abs(g[k][kk] - h);if (cha % d == 0)res += cha / d;elseff = 0;}}if (ff)sum = min(sum, res);}if (sum == 0x3f3f3f3f)cout << -1 << endl;elsecout << sum << endl;
}