资深光能
- #include <iostream>
- #include <cmath>
- using namespace std;
- int a[1010];
- bool f(int n){
- if(n==1) return false;
- for(int i=2;i<=sqrt(n);i++){
- if(n%i==0) return false;
- }
- return true;
- }
- int main(){
- int n,cnt=0;
- cin>>n;
- for(int i=2;i<=n;i++){
- if(f(i) && f(n-i) && a[n-i]==0&&i+(n-i)==n){
- cnt++;
- a[i]++;
- }
- }
- cout<<cnt;
- return 0;
- }
哪错了
资深守护
#pragma GCC optimize(3)
#pragma GCC target("avx")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
#pragma GCC optimize("Ofast","inline","-ffast-math")
#pragma GCC target("avx,sse2,sse3,sse4,mmx")
#include <iostream>
#include <cmath>
using namespace std;
int a[1010];
bool f(int n){
if(n==1) return false;
for(int i=2;i<=sqrt(n);i++){
if(n%i==0) return false;
}
return true;
}
int main(){
int n,cnt=0;
cin>>n;
for(int i=2;i<=n/2;i++){
if(f(i)&&f(n-i)){
cnt++;
a[i]++;
}
}
cout<<cnt;
return 0;
}
资深光能
ding
资深光能
#include <iostream>
#include <cmath>
using namespace std;
int a[1010];
bool f(int n){
if(n==1) return false;
for(int i=2;i<=sqrt(n);i++){
if(n%i==0) return false;
}
return true;
}
int main(){
int n,cnt=0;
cin>>n;
for(int i=2;i<=n;i++){
if(f(i) && f(n-i) && a[n-i]==0&&i+(n-i)==n){
cnt++;
a[i]++;
}
}
for(int i=2;i<=sqrt(n);i++)
{
if(n%i==0)
cnt++;
}
cout<<cnt;
return 0;
}
哪错了
