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- #include<stdio.h>
- #include<math.h>
- int main()
- {
- int n;
- int c;
- c = 0;
- int ch = 0;
- scanf("%d", &n);
- printf("2\n");
- for(int i = 3; i < n; i++)
- {
- c = 0;
- int x = (int)sqrt(i);
- for(int k = 2; k < x; k++)
- {
- ch++;
- if(i % k == 0) {
- c = 1;
- break;
- }
- }
- if(c == 0)
- {
- printf("%d\n", i);
- }
- }
- printf("%d", ch);
- return 0;
- }
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