/* * * author: attacker * * created: 08.02.2026 17:56:27 */ #include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "algo/debug.h" #else #define debug(...) 42 #endif #define mt_rng mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int n; cin >> n; vector<int64_t> a(n), b(n); for (int i = 0; i < n; i++) { cin >> a[i] >> b[i]; } int64_t ans = -1; for (int mask = 1; mask < (1 << n); mask++) { int64_t s = 0, mx = 0, mn = int64_t(1e18); for (int i = 0; i < n; i++) { if (mask & (1 << i)) { mx = max(mx, a[i]); mn = min(mn, a[i]); s += b[i]; } } ans = max(ans, s - (mx - mn)); } cout << ans << '\n'; return 0; }