题意:

输入一个int范围内的正整数,输出它最多可以被分解为多少个连续的因子并输出这些因子以*连接。

trick:

测试点5包含N本身是一个素数的数据,此时应当输出1并把N输出。

测试点5包含一个2e9以上的int整数,此时最好把n当作long long 否则以下代码会运行超时。

AAAAAccepted code:

 #define HAVE_STRUCT_TIMESPEC
#include<bits/stdc++.h>
using namespace std;
int ans[][];
int main(){
ios::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
long long n;
cin>>n;
long long tamp=;
int num=;
int cnt=;
int mx=;
int pos=;
for(long long j=;j*j<=n;++j){
tamp=n;
for(long long i=j;i*i<=n;++i)
if(tamp%i==){
tamp/=i;
ans[num][++cnt]=i;
}
else
break;
if(cnt>mx){
mx=cnt;
pos=num;
}
++num;
cnt=;
}
if(!mx){
cout<<"1\n"<<n;
return ;
}
else{
cout<<mx<<"\n";
for(int i=;i<=mx;++i){
cout<<ans[pos][i];
if(i<mx)
cout<<"*";
}
}
return ;
}

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