这里直接贴我的程序，题目和思路另翻博客

B. Sherlock and his girlfriend`//
//  main.cpp
//  journey
//
//  Created by zhangdenny on 2017/3/4.
//  Copyright © 2017年 Kirito. All rights reserved.
//
#include  <functional>
#include  <algorithm>
#include  <exception>
#include  <stdexcept>
#include  <streambuf>
#include  <iterator>
#include  <string.h>
#include  <stdlib.h>
#include  <typeinfo>
#include  <valarray>
#include  <iostream>
#include  <sstream>
#include  <istream>
#include  <stdio.h>
#include  <climits>
#include  <clocale>
#include  <complex>
#include  <csetjmp>
#include  <csignal>
#include  <cstdarg>
#include  <cstddef>
#include  <ctype.h>
#include  <cassert>
#include  <cstdlib>
#include  <utility>
#include  <cstring>
#include  <numeric>
#include  <ostream>
#include  <cwctype>
#include  <fstream>
#include  <iomanip>
#include  <math.h>
#include  <bitset>
#include  <cctype>
#include  <string>
#include  <vector>
#include  <limits>
#include  <locale>
#include  <memory>
#include  <cerrno>
#include  <iosfwd>
#include  <cfloat>
#include  <cstdio>
#include  <cwchar>
#include  <cmath>
#include  <ctime>
#include  <deque>
#include  <queue>
#include  <stack>
#include  <list>
#include  <ios>
#include  <map>
#include  <set>
#include  <new>
#define fi first
#define se second
#define pb push_back
#define ll long long
using namespace std;
int n,m,t;
int main()
{cin>>t;if(t<=2)cout<<"1"<<endl;elsecout<<"2"<<endl;int j;for(int i=2;i<=t+1;i++){m=sqrt(i);for(j=2;j<=m;j++)if(i%j==0)break;if(j>m)cout<<"1 ";else cout<<"2 ";}return 0;
}`

C. Molly’s Chemicals

//
//  main.cpp
//  journey
//
//  Created by zhangdenny on 2017/3/4.
//  Copyright © 2017年 Kirito. All rights reserved.
//
#include  <functional>
#include  <algorithm>
#include  <exception>
#include  <stdexcept>
#include  <streambuf>
#include  <iterator>
#include  <string.h>
#include  <stdlib.h>
#include  <typeinfo>
#include  <valarray>
#include  <iostream>
#include  <sstream>
#include  <istream>
#include  <stdio.h>
#include  <climits>
#include  <clocale>
#include  <complex>
#include  <csetjmp>
#include  <csignal>
#include  <cstdarg>
#include  <cstddef>
#include  <ctype.h>
#include  <cassert>
#include  <cstdlib>
#include  <utility>
#include  <cstring>
#include  <numeric>
#include  <ostream>
#include  <cwctype>
#include  <fstream>
#include  <iomanip>
#include  <math.h>
#include  <bitset>
#include  <cctype>
#include  <string>
#include  <vector>
#include  <limits>
#include  <locale>
#include  <memory>
#include  <cerrno>
#include  <iosfwd>
#include  <cfloat>
#include  <cstdio>
#include  <cwchar>
#include  <cmath>
#include  <ctime>
#include  <deque>
#include  <queue>
#include  <stack>
#include  <list>
#include  <ios>
#include  <map>
#include  <set>
#include  <new>
#define fi first
#define se second
#define pb push_back
#define ll long long
using namespace std;
ll n,k,dq;
vector<ll> v;
ll x;
map<ll,int> mp;
ll ans;
int main()
{cin>>n>>k;dq=1;mp.clear();if (abs(k)==1){v.push_back(1);if (k==-1) v.push_back(-1);}else{while (dq<=1e14){v.push_back(dq);dq=dq*k;}}mp[0]=1;dq=0;for (int i=1;i<=n;++i){cin>>x;dq+=x;for (int j=0;j<v.size();j++)if (mp.count(dq-v[j])!=0)ans+=mp[dq-v[j]];mp[dq]+=1;}cout<<ans<<endl;return 0;
}

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