#include #define rep(i,a,b) for(int i=a;i=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; templatebool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b> N; rep(i, 0, N) cin >> A[i] >> B[i]; rep(i, 0, 101) rep(j, 0, 204010) dp[i][j] = inf; int base = 101010; dp[0][base] = 0; rep(i, 0, N) rep(j, 1010, 200010) { int d = j - base, dd; // get A dd = d - A[i]; if (0 < d and dd < 0) chmin(dp[i + 1][dd + base], dp[i][j] + abs(dd)); else if(d <= 0) chmin(dp[i + 1][dd + base], dp[i][j] + A[i]); else chmin(dp[i + 1][dd + base], dp[i][j]); // get B dd = d + B[i]; if (0 <= d) chmin(dp[i + 1][dd + base], dp[i][j] + B[i]); else if (d < 0 and 0 <= dd) chmin(dp[i + 1][dd + base], dp[i][j] + dd); else chmin(dp[i + 1][dd + base], dp[i][j]); } int ans = inf; rep(j, 0, 204010) chmin(ans, dp[N][j]); cout << ans << endl; }