codeforces#FF(div2) D DZY Loves Modification_html/css_WEB-ITnose

First of all, you must know that the order is irrelevant when selecting rows and columns

Use two arrays row[i] and col[j] to represent the maximum value that can be obtained by selecting only row i and selecting only The maximum value that can be obtained in column j

This is maintained by the priority queue. After a row (column) is not selected, the sum of the row (column) minus the corresponding np (mp) is added to the queue again

The number of times the enumeration selects a row is i, then the number of times a column is selected is k - i times, ans = row[i] col[k - i] - (k - i) * i * p;

Since the order is irrelevant, it can be seen as selecting i rows first, then subtract i * p every time you select a column, and select k - i columns, that is, subtract (k - i) * i * p

//#pragma comment(linker, "/STACK:102400000,102400000")//HEAD#include <cstdio>#include <cstring>#include <vector>#include <iostream>#include <algorithm>#include <queue>#include <string>#include <set>#include <stack>#include <map>#include <cmath>#include <cstdlib>using namespace std;//LOOP#define FE(i, a, b) for(int i = (a); i <= (b); ++i)#define FED(i, b, a) for(int i = (b); i>= (a); --i)#define REP(i, N) for(int i = 0; i < (N); ++i)#define CLR(A,value) memset(A,value,sizeof(A))//STL#define PB push_back//INPUT#define RI(n) scanf("%d", &n)#define RII(n, m) scanf("%d%d", &n, &m)#define RIII(n, m, k) scanf("%d%d%d", &n, &m, &k)#define RS(s) scanf("%s", s)#define FF(i, a, b) for(int i = (a); i < (b); ++i)#define FD(i, b, a) for(int i = (b) - 1; i >= (a); --i)#define CPY(a, b) memcpy(a, b, sizeof(a))#define FC(it, c) for(__typeof((c).begin()) it = (c).begin(); it != (c).end(); it++)#define EQ(a, b) (fabs((a) - (b)) <= 1e-10)#define ALL(c) (c).begin(), (c).end()#define SZ(V) (int)V.size()#define RIV(n, m, k, p) scanf("%d%d%d%d", &n, &m, &k, &p)#define RV(n, m, k, p, q) scanf("%d%d%d%d%d", &n, &m, &k, &p, &q)#define WI(n) printf("%d\n", n)#define WS(s) printf("%s\n", s)#define sqr(x) x * xtypedef vector <int> VI;typedef unsigned long long ULL;typedef long long LL;const int INF = 0x3f3f3f3f;const int maxn = 1010;const double eps = 1e-10;const LL MOD = 1e9 + 7;int ipt[maxn][maxn];LL row[maxn * maxn], col[maxn * maxn];LL rtol[maxn], ctol[maxn];int main(){    int n, m, k, p;    while (~RIV(n, m, k, p))    {        priority_queue<LL> r, c;        int radd = 0, cadd = 0;        CLR(rtol, 0), CLR(ctol, 0);        FE(i, 1, n)            FE(j, 1, m)            {                RI(ipt[i][j]);                rtol[i] += ipt[i][j];                ctol[j] += ipt[i][j];            }        FE(i, 1, n)            r.push(rtol[i]);        FE(j, 1, m)            c.push(ctol[j]);        row[0] = 0, col[0] = 0;        FE(i, 1, k)        {            LL x = r.top(), y = c.top();             r.pop(), c.pop();            r.push(x - m * p);            c.push(y - n * p);            row[i] = row[i - 1] + x;            col[i] = col[i - 1] + y;        }//        FE(i, 0, k)//            cout << row[i] + col[k - i] <<endl;        LL ans = -1e18;        FE(i, 0, k)            ans = max(ans, row[i] + col[k - i] - (LL)i * (k - i)* p);        cout << ans << endl;    }    return 0;}/*2 2 4 21 2 3 102 3 5 22 2 22 2 2*/