#pragma GCC target("avx,sse2,sse3,sse4,popcnt")
#pragma GCC optimize("O2,O3,Ofast,inline,unroll-all-loops,-ffast-math")
#include <bits/stdc++.h>
using namespace std;
#define js ios::sync_with_stdio(false);cin.tie(0); cout.tie(0)
#define all(__vv__) (__vv__).begin(), (__vv__).end()
#define endl "\n"
#define pai pair<int, int>
#define mk(__x__,__y__) make_pair(__x__,__y__)
#define ms(__x__,__val__) memset(__x__, __val__, sizeof(__x__))
typedef long long ll; typedef unsigned long long ull; typedef long double ld;
const int MOD = 1e9 + 7;
const int INF = 0x3f3f3f3f;
inline ll read() { ll s = 0, w = 1; char ch = getchar(); for (; !isdigit(ch); ch = getchar()) if (ch == '-') w = -1; for (; isdigit(ch); ch = getchar())    s = (s << 1) + (s << 3) + (ch ^ 48); return s * w; }
inline void print(ll x) { if (!x) { putchar('0'); return; } char F[40]; ll tmp = x > 0 ? x : -x; if (x < 0)putchar('-');    int cnt = 0;    while (tmp > 0) { F[cnt++] = tmp % 10 + '0';        tmp /= 10; }    while (cnt > 0)putchar(F[--cnt]); }
inline ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
ll qpow(ll a, ll b) { ll ans = 1;    while (b) { if (b & 1)    ans *= a;        b >>= 1;        a *= a; }    return ans; }    ll qpow(ll a, ll b, ll mod) { ll ans = 1; while (b) { if (b & 1)(ans *= a) %= mod; b >>= 1; (a *= a) %= mod; }return ans % mod; }
inline int lowbit(int x) { return x & (-x); }

const int N = 1e5 + 7;
double dp[500];

double fun(int n) {
    double ans = 0.0;
    if (n >= 95)    ans += 4.3;
    else if (n >= 90)    ans += 4.0;
    else if (n >= 85)    ans += 3.7;
    else if (n >= 80)    ans += 3.3;
    else if (n >= 75)    ans += 3.0;
    else if (n >= 70)    ans += 2.7;
    else if (n >= 67)    ans += 2.3;
    else if (n >= 65)    ans += 2.0;
    else if (n >= 62)    ans += 1.7;
    else if (n >= 60)    ans += 1.0;
    return ans;
}

int main() {
    for (int i = 0; i <= 400; ++i)
        for (int j = 0; j < i; ++j)
            dp[i] = max(dp[i], dp[j] + fun(i - j));
    int T = read();
    while (T--) {
        int n = read();
        printf("%.1f\n", dp[n]);
    }
    return 0;
}