您这个是超时了吗..
by Nicoppa @ 2019-04-28 14:05:37
```cpp
//#define fre yes
#include <cmath>
#include <cstdio>
#include <iostream>
#define int long long
int n, m, l, r, i, j, sum;
bool Prime(int x) {
for(int i = 2; i <= sqrt(n); i++) {
if(x % i == 0) return true; //您这里写错了吧 不是n 是 i
} return false;
}
signed main() {
scanf("%lld %lld", &n, &m);
for(i = 1; i <= n; i++) {
scanf("%lld %lld", &l, &r);
if(l == 1) l++;
if(l < 1 || r > m) {
puts("Crossing the line");
break;
}
for(j = l; j <= r; j++) {
if(!Prime(j)) {
sum++;
}
}
printf("%lld\n", sum);
} return 0;
}
```
by Nicoppa @ 2019-04-28 14:08:23
~~什么码风~~
by ferrum_cccp @ 2019-04-28 15:51:38