題目描述:
代碼:
#include<iostream>
using namespace std;
int n;
int total;
int a[10001];
void print(int cnt){
total++;
cout<<n<<"=";
for(int i=1;i<cnt;++i){
cout<<a[i]<<'+';
}
cout<<a[cnt]<<endl;
}
void f(int num,int previous,int cnt){
if(num==0){
print(cnt-1);
return;
}
for(int i=previous;i<=num&&i<n;++i){
a[cnt]=i;
num-=i;
f(num,i,cnt+1);
num+=i;
}
}
int main(){
cin>>n;
f(n,1,1);
cout<<"total:"<<total;
return 0;
}