母函数--例题

题意:http://acm.hdu.edu.cn/showproblem.php?pid=2082

  1 #define IOS ios_base::sync_with_stdio(0); cin.tie(0);
  2 #include <cstdio>//sprintf islower isupper
  3 #include <cstdlib>//malloc  exit strcat itoa system("cls")
  4 #include <iostream>//pair
  5 #include <fstream>//freopen("C:\Users\13606\Desktop\Input.txt","r",stdin);
  6 #include <bitset>
  7 //#include <map>
  8 //#include<unordered_map>
  9 #include <vector>
 10 #include <stack>
 11 #include <set>
 12 #include <string.h>//strstr substr
 13 #include <string>
 14 #include <time.h>// srand(((unsigned)time(NULL))); Seed n=rand()%10 - 0~9;
 15 #include <cmath>
 16 #include <deque>
 17 #include <queue>//priority_queue<int, vector<int>, greater<int> > q;//less
 18 #include <vector>//emplace_back
 19 //#include <math.h>
 20 #include <cassert>
 21 //#include <windows.h>//reverse(a,a+len);// ~ ! ~ ! floor
 22 #include <algorithm>//sort + unique : sz=unique(b+1,b+n+1)-(b+1);+nth_element(first, nth, last, compare)
 23 using namespace std;//next_permutation(a+1,a+1+n);//prev_permutation
 24 //******************
 25 int abss(int a);
 26 int lowbit(int n);
 27 int Del_bit_1(int n);
 28 int maxx(int a,int b);
 29 int minn(int a,int b);
 30 double fabss(double a);
 31 void swapp(int &a,int &b);
 32 clock_t __STRAT,__END;
 33 double __TOTALTIME;
 34 void _MS(){__STRAT=clock();}
 35 void _ME(){__END=clock();__TOTALTIME=(double)(__END-__STRAT)/CLOCKS_PER_SEC;cout<<"Time: "<<__TOTALTIME<<" s"<<endl;}
 36 //***********************
 37 #define rint register int
 38 #define fo(a,b,c) for(rint a=b;a<=c;++a)
 39 #define fr(a,b,c) for(rint a=b;a>=c;--a)
 40 #define mem(a,b) memset(a,b,sizeof(a))
 41 #define pr printf
 42 #define sc scanf
 43 #define ls rt<<1
 44 #define rs rt<<1|1
 45 typedef pair<int,int> PII;
 46 typedef vector<int> VI;
 47 typedef long long ll;
 48 const double E=2.718281828;
 49 const double PI=acos(-1.0);
 50 const ll INF=(1LL<<60);
 51 const int inf=(1<<30);
 52 const double ESP=1e-9;
 53 const int mod=(int)1e9+7;
 54 const int N=(int)1e6+10;
 55 
 56 int a[60],b[60];
 57 int num[60];
 58 
 59 void solve()
 60 {
 61     mem(a,0);
 62     mem(b,0);
 63     for(int i=1;i<=26;++i)
 64     {
 65         int n;
 66         sc("%d",&n);
 67         num[i]=n;
 68     }
 69     bool f=0;
 70     for(int i=1;i<=26;++i)
 71     {
 72         int sz=num[i]+1;
 73         for(int j=0;j<sz;++j)
 74         {
 75             if(!f)b[j]=1;
 76             else
 77             {
 78                 for(int k=0;k<=50;++k)
 79                 {
 80                     if(k+j*i<=50)
 81                         b[j*i+k]+=a[k];
 82                 }
 83             }
 84         }
 85         fo(j,0,59)a[j]=b[j];
 86         mem(b,0);
 87         f=1;
 88     }
 89     ll ans=0;
 90     fo(i,1,50)
 91         ans+=a[i];
 92     pr("%lld
",ans);
 93 }
 94 
 95 int main()
 96 {
 97     int T;
 98     sc("%d",&T);
 99     while(T--)solve();
100     return 0;
101 }
102 
103 /**************************************************************************************/
104 
105 int maxx(int a,int b)
106 {
107     return a>b?a:b;
108 }
109 
110 void swapp(int &a,int &b)
111 {
112     a^=b^=a^=b;
113 }
114 
115 int lowbit(int n)
116 {
117     return n&(-n);
118 }
119 
120 int Del_bit_1(int n)
121 {
122     return n&(n-1);
123 }
124 
125 int abss(int a)
126 {
127     return a>0?a:-a;
128 }
129 
130 double fabss(double a)
131 {
132     return a>0?a:-a;
133 }
134 
135 int minn(int a,int b)
136 {
137     return a<b?a:b;
138 }
原文地址:https://www.cnblogs.com/--HPY-7m/p/11780624.html