from time import time
time0=time()
from random import randint,random
e=2.718281828

N,M,K=map(int,input().split())
A=list(map(int,input().split()))
A.append(0)

ANS=[0]*K
score=0
MAX=0

while time()-time0<1.8:
    x,y=randint(0,K-1),randint(0,N)

    before=ANS[x]
    plus=A[y]-before

    if plus>0 and score+plus<=M:
        ANS[x]=A[y]
        score+=plus
        MAX=max(MAX,score)
        
    elif score+plus<=M:

        mu=e**(plus*2/(time()-time0))

        #print(plus,mu)

        if mu>random():
            ANS[x]=A[y]
            score+=plus
            MAX=max(MAX,score)

    #print(ANS,score)
            

print(MAX)