//{{{ #include <bits/stdc++.h> using namespace std; #define rep(...) repN((__VA_ARGS__,rep3,rep2,loop,~))(__VA_ARGS__) #define loop(n) rep2(_loop_,n) #define rep2(i,n) rep3(i,0,n) #define rep3(i,begin,end) for(int i=(int)(begin),i##_end=(int)(end);i<i##_end;++i) #define repN(a) repX a #define repX(a0,a1,a2,x,...) x //}}} int C[1000000]; int main(void){ int N; cin >> N; int total = 0; rep(i, N){ cin >> C[i]; total += C[i]; } int ans = 0; rep(i, N){ if(C[i] * 10 <= total) ans++; } ans *= 30; printf("%d\n", ans); return 0; }