#include //#include using namespace std; //using namespace atcoder; //using mint = modint1000000007; //const int mod = 1000000007; //using mint = modint998244353; //const int mod = 998244353; //const int INF = 1e9; const long long LINF = 1e18; #define rep(i, n) for (int i = 0; i < (n); ++i) #define rep2(i,l,r)for(int i=(l);i<(r);++i) #define rrep(i, n) for (int i = (n) - 1; i >= 0; --i) #define rrep2(i,l,r)for(int i=(r) - 1;i>=(l);--i) #define all(x) (x).begin(),(x).end() #define allR(x) (x).rbegin(),(x).rend() #define P pair template inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; } template inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; } int main() { std::ios::sync_with_stdio(false); std::cin.tie(nullptr); int n; cin >> n; vectora(n), b(n); rep(i, n)cin >> a[i] >> b[i]; vector dp(n + 1, vector(n + 10, -LINF)); dp[n][0] = 0;// このあとのattの回数とダメージのmax?? rrep2(i, 1, n + 1) { rep(j, n + 1) { if (dp[i][j] < 0)continue; // att { long long val = dp[i][j]; val += b[i - 1]; chmax(dp[i - 1][j + 1], val); } // charge { long long val = dp[i][j]; val += a[i - 1] * j; chmax(dp[i - 1][j], val); } } } long long ans = 0; rep(i, n + 1) chmax(ans, dp[0][i]); cout << ans << endl; return 0; }