越南小学三年级一道数学题解答

看到这则新闻后觉得有点无语，这道题也难的没那么夸张，写程序的话也简单，希望媒体报道的新闻像个新闻，别什么事都当新闻报，倒是希望多报一些关于科技和经济的一些有价值的新闻。废话少说，直接上代码了。

#include<iostream>
#include<stdlib.h>
#include<fstream>
#include<time.h>
using namespace std;
int main(){
    fstream outfile;
    outfile.open("outNum.txt",ios::out);
    cout<<"beginnig the count"<<endl;
    time_t begin_time=time(0);
    tm tim_begin=*localtime(&begin_time);
    int allofNum=0,num=0;
    for(int a=1;a<10;a++){
        for(int b=1;b<10;b++){
            for(int c=1;c<10;c++){
                for(int d=1;d<10;d++){
                    for(int e=1;e<10;e++){
                        for(int f=1;f<10;f++){
                            for(int g=1;g<10;g++){
                                for(int h=1;h<10;h++){
                                    for(int i=1;i<10;i++){
                                        int N[9]={a,b,c,d,e,f,g,h,i};
                                        if(66==a+13*b/c+d+12*e-f-11+g*h/i-10&&!(13*b%c)&&!(g*h%i)){
                                                     outfile<<a<<","<<b<<","<<c<<","<<d<<","<<e<<","<<f<<","<<g<<","<<h<<","<<g<<","<<i<<endl;
                                                     cout<<a<<","<<b<<","<<c<<","<<d<<","<<e<<","<<f<<","<<g<<","<<h<<","<<g<<","<<i<<endl;
                                                     num++;
                                                 }
                                        allofNum++;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    cout<<"the end"<<endl;
    cout<<"the all of Num is: "<<allofNum<<endl;;
    cout<<"the num is: "<<num<<endl;;
    outfile.close();
    time_t end_time=time(0);
    tm tim_end=*localtime(&end_time);
    int usetime_sec=tim_end.tm_sec-tim_begin.tm_sec;
    cout<<"using time "<<usetime_sec<<endl;
    return 0;
}

从输出结果可以看出有上面的题总共有351020个解，用最基本的for循环计算的话需要10秒钟时间，有错误的话希望大家指出来。