AcWing 789. 数的范围
原题链接
简单
作者:
喵总不摸鱼
,
2022-02-21 19:17:07
,
所有人可见
,
阅读 187
C++ 代码
#include <iostream>
using namespace std;
const int N = 100010;
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;
}