题解 | #KiKi求质数个数#
KiKi求质数个数
https://www.nowcoder.com/practice/d3a404ee0f8d41f98bf4707035d91086
#include <stdio.h> int main() { int i = 0; int j = 0; int cout = 0 ; for (i = 100; i < 1000; i++) { for (j = 2; j < i; j++) { if (i % j == 0) { cout++; break; } } } printf("%d", 900-cout); return 0; } //逆向思维 用合数来求解