[0,x)的随机数

 1 #include <cstdio>
 2 #include <cstdlib>
 3 #include <cmath>
 4 #include <cstring>
 5 #include <time.h>
 6 #include <string>
 7 #include <set>
 8 #include <map>
 9 #include <list>
10 #include <stack>
11 #include <queue>
12 #include <vector>
13 #include <bitset>
14 #include <ext/rope>
15 #include <algorithm>
16 #include <iostream>
17 using namespace std;
18 #define ll long long
19 #define minv 1e-6
20 #define inf 1e9
21 #define pi 3.1415926536
22 #define nl 2.7182818284
23 const ll mod=1e9+7;//998244353
24 const int maxn=1e5+10;
25 
26 
27 int main()
28 {
29     int x=300000,y,n,t=100;
30     srand(time(NULL));
31     y=x/32768+1;///+1
32     //[0,y)*32768+[0,32768)
33     while (t--)
34     {
35         while (( n = rand()%y*32768 + rand() )>=x);
36         printf("%d\n",n);
37     }
38     return 0;
39 }