#include <bits/stdc++.h>
using namespace std;
namespace io {
const int L = (1 << 20) + 1;
char buf[L], *S, *T, c;
char getchar() {
  if (__builtin_expect(S == T, 0)) {
    T = (S = buf) + fread(buf, 1, L, stdin);
    return (S == T ? EOF : *S++);
  }
  return *S++;
}
int inp() {
  int x = 0, f = 1;
  char ch;
  for (ch = getchar(); !isdigit(ch); ch = getchar())
    if (ch == '-') f = -1;
  for (; isdigit(ch); x = x * 10 + ch - '0', ch = getchar())
    ;
  return x * f;
}
unsigned inpu() {
  unsigned x = 0;
  char ch;
  for (ch = getchar(); !isdigit(ch); ch = getchar())
    ;
  for (; isdigit(ch); x = x * 10 + ch - '0', ch = getchar())
    ;
  return x;
}
long long inp_ll() {
  long long x = 0;
  int f = 1;
  char ch;
  for (ch = getchar(); !isdigit(ch); ch = getchar())
    if (ch == '-') f = -1;
  for (; isdigit(ch); x = x * 10 + ch - '0', ch = getchar())
    ;
  return x * f;
}
char B[25], *outs = B + 20, *outr = B + 20;
template <class T>
inline void print(register T a, register char x = 0) {
  if (x) *--outs = x, x = 0;
  if (!a)
    *--outs = '0';
  else
    while (a) *--outs = (a % 10) + 48, a /= 10;
  if (x) *--outs = x;
  fwrite(outs, outr - outs, 1, stdout);
  outs = outr;
}
};  // namespace io
using io ::inp;
using io ::inp_ll;
using io ::inpu;
using io ::print;
using i32 = int;
using i64 = long long;
using u8 = unsigned char;
using u32 = unsigned;
using u64 = unsigned long long;
using f64 = double;
using f80 = long double;
long long power(long long a, long long b, long long p) {
  if (!b) return 1;
  long long t = power(a, b / 2, p);
  t = t * t % p;
  if (b & 1) t = t * a % p;
  return t;
}
template <class T>
inline void freshmin(T &a, const T &b) {
  if (a > b) a = b;
}
template <class T>
inline void freshmax(T &a, const T &b) {
  if (a < b) a = b;
}
const int MAXN = 510;
const int MAXP = 10000000;
const u64 MOD = 1000000007;
const f80 MI = f80(1) / MOD;
const long long INF = 10000000000000000LL;
const long long inf = 5000000000000LL;
int n;
struct node {
  long long a, b, k;
  void init() { scanf("%lld%lld%lld", &a, &b, &k); }
  bool operator<(const node &A) const { return b > A.b; }
} p[MAXN];
long long F[MAXN][MAXN];
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; ++i) p[i].init();
  sort(p + 1, p + n + 1);
  for (int i = 1; i <= n; ++i)
    for (int j = 0; j <= i; ++j) {
      F[i][j] = F[i - 1][j] + max(p[i].a - p[i].b * p[i].k, 0LL);
      if (j) freshmax(F[i][j], F[i - 1][j - 1] + p[i].a - p[i].b * (j - 1));
    }
  cout << *max_element(F[n], F[n] + n + 1) << endl;
  return 0;
}
