题意：
把n拆成立方和的形式
solution：
把立方看成权值
运用递推求解01背包
1 #include<iostream> 2 #include<cstdio> 3 #include<algorithm> 4 #include<vector> 5 #include<queue> 6 #include<cstring> 7 #define mp make_pair 8 #define pb push_back 9 #define first fi 10 #define second se 11 #define pw(x) (1ll << (x)) 12 #define sz(x) ((int)(x).size()) 13 #define all(x) (x).begin(),(x).end() 14 #define rep(i,l,r) for(int i=(l);i<(r);i++) 15 #define per(i,r,l) for(int i=(r);i>=(l);i--) 16 #define FOR(i,l,r) for(int i=(l);i<=(r);i++) 17 #define eps 1e-9 18 #define PIE acos(-1) 19 #define cl(a,b) memset(a,b,sizeof(a)) 20 #define fastio ios::sync_with_stdio(false);cin.tie(0); 21 #define lson l , mid , ls 22 #define rson mid + 1 , r , rs 23 #define ls (rt<<1) 24 #define rs (ls|1) 25 #define INF 0x3f3f3f3f 26 #define LINF 0x3f3f3f3f3f3f3f3f 27 #define freopen freopen("in.txt","r",stdin); 28 #define cfin ifstream cin("in.txt"); 29 #define lowbit(x) (x&(-x)) 30 #define sqr(a) a*a 31 #define ll long long 32 #define ull unsigned long long 33 #define vi vector<int> 34 #define pii pair<int, int> 35 #define dd(x) cout << #x << " = " << (x) << ", " 36 #define de(x) cout << #x << " = " << (x) << " " 37 #define endl " " 38 using namespace std; 39 //********************************** 40 const int maxn=1e5+7; 41 int n; 42 ll cube[22]; 43 ll dp[maxn]; 44 //********************************** 45 void Init() 46 { 47 FOR(i,1,21)cube[i]=i*i*i; 48 cl(dp,0);dp[0]=1; 49 } 50 //********************************** 51 int main() 52 { 53 Init(); 54 FOR(i,1,21)rep(j,cube[i],maxn)dp[j]+=dp[j-cube[i]]; 55 while(cin>>n)cout<<dp[n]<<endl; 56 return 0; 57 }