basic.cpp

// 提交代码前 检查 是否注释掉 辅助调试代码

ios_base::sync_with_stdio(0), cin.tie(0);
#pragma GCC optimize(2)
#pragma G++ optimize(2)
clock_t st = clock();
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#define PI acos(-1.0)
#define PII pair<int, int>
typedef long long ll;
using ll = __int128;
using ld = long double;
printf("%.15Lf\n", (ld));
#define int long long  // 注意：类型宏定义放在变量定义前面
/*----------------------------------------*/
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define echo(a) cout << (a) << endl
using namespace std;

void solve() {}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int T = 1;
    cin >> T;
    while (T--) solve();
    return 0;
}
/*----------------------------------------*/
#define ROF(i, a, b) for (int i = (a); i >= (b); --i)
#define abss(x) ((x) > (0) ? (x) : (-1) * (x))
#define maxs(a, b) ((a) > (b) ? (a) : (b))
#define mins(a, b) ((a) < (b) ? (a) : (b))
#define mem(a) memset((a), 0, sizeof(a))
#define memmax(a) memset(a, 0x3f, sizeof(a))
#define memmin(a) memset(a, -0x3f, sizeof(a))
#define all(a) (a).begin(), (a).end()
#define elif else if
#define scan(a) scanf("%I64d", &(a))
#define print(a) printf("%I64d", (a))
#define endl '\n'
/*谨慎使用
#define push_back emplace_back
#define memmax(a) memset(a,63,sizeof(a))
#define memmax(a) memset(a,127,sizeof(a))
#define memmin(a) memset(a,128,sizeof(a))
const int mmax=2139062143;
const int mmin=-2139062144;
*/
const int INF = (1 << 30);
const int inf = (-1 << 30);
const int INF = INT_MAX;
const long long INF = LLONG_MAX;

/*----------------------------------------*/
struct RG {
    int l, r;
    bool operator<(const RG &y) const { return r < y.r; }
};
/*----------------------------------------*/
floor();  // 不大于自变量的最大整数 向下取整
ceil();   // 不小于自变量的最大整数 向上取整
round();  // 四舍五入到最邻近的整数
/*----------------------------------------*/