N = int(input())
A, B = [0] * N, [0] * N
for i in range(N):
    A[i], B[i] = map(int, input().split())

inf = 10 ** 18
M = 10 ** 5 + 5
pre = [inf] * M
pre[0] = 0
for a, b in zip(A, B):
    dp = [inf] * M
    for i in range(M):
        dp[i] = pre[i] + b
        if i - a >= 0:
            dp[i] = min(dp[i], pre[i - a])

    dp, pre = pre, dp

ans = inf
for i in range(M):
    ans = min(ans, max(i, pre[i]))

print(ans)