rendered paste body#include <iostream>using namespace std;int main(void){int i, j;int m, k, s, p, r;long int l, zysk, chwilowo, z;int c[100];char czytaj[300];zysk = 0;chwilowo = 0;cin >> m >> l >> k >> s;for (i=0; i<m; i++) cin >> c[i];for (i=0; i<l; i++){ cin >> p >> r; chwilowo = c[p-1]*r -(s*((r/k)));if ((r)%k != 0) chwilowo=chwilowo-s; for (j=r; j>=0; j--) { z = c[p-1]*(r-j) -(s*(((r-j)/k))); if ((r-j)%k != 0) z=z-s; if (chwilowo < z) chwilowo = z; }zysk=zysk+chwilowo; chwilowo=0;}cout << zysk;return 0;}