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| #include<bits/stdc++.h>
#define ll long long
#define fsb(a,b,c) for(ll a=b;a<=c;a++)
#define fbs(a,b,c) for(ll a=b;a>=c;a--)
using namespace std;
ll n,a=0,b=1;
template<typename qw>inline void rll(qw &x){
x=0;qw f=1;char c=getchar();
while(!isdigit(c))f=c=='-'?-1:f,c=getchar();
while(isdigit(c))x=x*10+c-'0',c=getchar();
x*=f;
}
inline ll gcd(ll a,ll b){
return b==0?a:gcd(b,a%b);
}
inline void add(ll aa,ll bb){
ll k=gcd(b,bb),ansa,ansb;
ansb=b/k*bb;ansa=b/k*aa+bb/k*a;
k=gcd(ansa,ansb);
a=ansa/k;b=ansb/k;
}
inline ll len(ll x){
ll ans=0;
while(x>0){
ans++;x/=10;
}
return ans;
}
int main(){
rll(n);
fsb(i,1,n){
ll aa=n,bb=i,k=gcd(aa,bb);
aa/=k;bb/=k;
add(aa,bb);
}
if(a%b==0){
printf("%lld\n",a/b);
}else{
ll x=a/b;a-=x*b;ll lx=len(x),lb=len(b);
fsb(i,1,lx)printf(" ");printf("%lld\n",a);
printf("%lld",x);fsb(i,1,lb)printf("-");puts("");
fsb(i,1,lx)printf(" ");printf("%lld\n",b);
}
return 0;
}
|