C++11(clang++ 3.9) 解法, 执行用时: 10ms, 内存消耗: 1308K, 提交时间: 2019-12-18 20:48:59

#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int type(string s)
{
    if(s[0]>='0' && s[0]<='9') return 1;
    return 0;
}
string add(string a,string b)
{
    int x=type(a),y=type(b);
    if(x==1&&y==1) return to_string(stoi(a)+stoi(b));
    if(x+y==1)
    {
        if(x==0)
        {
            string ret;
            for(int i=1;i<=stoi(b);++i) ret+=a;
            return ret;
        }
        if(y==0)
        {
            string ret;
            for(int i=1;i<=stoi(a);++i) ret+=b;
            return ret;
        }
    }
    return a+b;
}
int main()
{
    string a,b,c,d,e,f,g,h,i,j,k;
    while(cin>>a>>b>>c>>d>>e>>f>>g>>h>>i>>j>>k)
    {
        cout<<add(add(add(a,add(add(b,c),add(d,e))),add(f,add(add(g,h),i))),add(j,k))<<endl;
    }
}

Python3(3.5.2) 解法, 执行用时: 33ms, 内存消耗: 4984K, 提交时间: 2019-12-14 17:22:35

#! /usr/bin/env python
# -*- coding: utf-8 -*-


def plus(a, b):
    if a.isdigit():
        if b.isdigit():
            return str(int(a)+int(b))
        else:
            return b*int(a)
    else:
        if b.isdigit():
            return a*int(b)
        else:
            return a+b


def cal(a, b, c, d, e, f, g, h, i, j, k):
    de = plus(d, e)
    bc = plus(b, c)
    bcde = plus(bc, de)
    gh = plus(g, h)
    ghi = plus(gh, i)
    fghi = plus(f, ghi)
    jk = plus(j, k)
    a_e = plus(a, bcde)
    a_i = plus(a_e, fghi)
    out = plus(a_i, jk)
    return out


ans = []
while True:
    try:
        s = input().split()
        ans.append(cal(*s))
    except:
        break
for i in ans:
    print(i)

C++14(g++5.4) 解法, 执行用时: 58ms, 内存消耗: 1256K, 提交时间: 2019-12-13 23:12:02

	#include<bits/stdc++.h>
using namespace std;

template<typename T1,typename T2>
T2 convert(T1 x){
    stringstream ss;T2 ret;
    ss<<x;ss>>ret;
    return ret;
}

auto tonum=convert<string,int>;
auto tostr=convert<int,string>;
auto isnum=[](string x){return tostr(tonum(x))==x;};

string operator*(string a,string b){
    if (isnum(a)&&isnum(b))return tostr(tonum(a)+tonum(b));
    if (!isnum(a)&&!isnum(b))return a+b;
    if (isnum(a))swap(a,b);
    string ret="";
    for (int i=0;i<tonum(b);i++)ret+=a;
    return ret;
}

int main(){
    string a,b,c,d,e,f,g,h,i,j,k;
    while(cin>>a>>b>>c>>d>>e>>f>>g>>h>>i>>j>>k)
        cout<<a*(b*c*(d*e))*(f*(g*h*i))*(j*k)<<endl;
}