inf=int(1e15)
n,lim,goal=map(int,input().split())
xvw=[(0,0,0)]
for _ in range(n):
  xvw.append(tuple(map(int,input().split())))
xvw.append((goal,0,0))
dp=[[inf]*(lim+1) for _ in range(n+2)]
dp[0][lim]=0
for i in range(n+1):
  s=xvw[i][0]
  g,v,w=xvw[i+1]
  for j in range(lim+1):
    if g<=s+j:
      dp[i+1][j-g+s]=min(dp[i+1][j-g+s],dp[i][j])
      dp[i+1][min(j-g+s+v,lim)]=min(dp[i+1][min(j-g+s+v,lim)],dp[i][j]+w)
ans=min(dp[n+1])
print(-1 if ans==inf else ans)