AcWing 789. 数的范围
原题链接
简单
作者:
往事似烟
,
2023-05-08 17:27:22
,
所有人可见
,
阅读 92
#include<iostream>
using namespace std;
const int N = 100000;
int n,m;
int q[N];
int main()
{
scanf("%d%d",&n,&m);
for(int i = 0;i < n;i++)
{
scanf("%d",&q[i]);
}
while(m--)
{
int x;
scanf("%d", &x);
int l = 0,r = n - 1;
while(l < r)
{
int mid = l + r >> 1;
if (q[mid] >= x)
{
r = mid;
}
else
{
l = mid + 1;
}
}
if (q[l] != x)
{
cout << "-1 -1" << endl;
}
else
{
cout << l <<" ";
int l = 0, r = n - 1;
while (l < r)
{
int mid = l + r + 1 >> 1;
if (q[mid] <= x) l = mid;
else r = mid - 1;
}
cout << l << endl;
}
}
return 0;
}