二分查找

#include<cstdio>
#include<algorithm>
using namespace std;
inline void in(int &x){
    char c;x=0;
    do c=getchar();
    while (c<'0'||c>'9');
    while (c>='0'&&c<='9')x=x*10+c-48,c=getchar();
}
void work(){
    
}
inline int low_bound(int a[],int len,int x) {
    int l = 0, r = len-1, mid;
    while (l<r) {
        mid = (l+r)>>1;
        if (a[mid]<x)l = mid+1;
        else r = mid;
    }
    return l;
}
inline int up_bound(int a[],int len,int x) {
    int l = 0, r = len-1, mid;
    while (l<r) {
        mid = (l+r)>>1;
        if (a[mid]<=x)l = mid+1;
        else r = mid;
    }
    return l;
}
int main(){
    int t;scanf("%d",&t);
    while(t--){
        work();
    }
    return 0;
}