#include <fstream>
#include <iostream>
using namespace std;
#define LEN 500
#include <cmath>
int main()
{
    setlocale(LC_CTYPE, "rus");
    double tab[LEN][LEN];

    ifstream g("GAZPROM.txt");

    int i,j,n=251;


    for (i=0;i<n;i++)
    {
        g>>tab[i][i];
        g>>tab[i][i+1];

    }
    cout<<endl<<"Íà÷àëüíàÿ òàáëèöà:"<<endl<<"  ÄÀÒÀ  ÖÅÍÀ"<<endl;

    for (i=0;i<n;i++)
    {
        if(tab[i][i]<100000)
        cout<<"  "<<tab[i][i]<<" "<<tab[i][i+1]<<endl;
        else
        cout<<" "<<tab[i][i]<<" "<<tab[i][i+1]<<endl;
    }

    double min=tab[0][1],date_min=tab[0][0], max=tab[0][1], date_max=tab[0][0];
    double i_min=1,i_max=1;
    for(i=1;i<n;i++)
    {
        if(min>tab[i][i+1])
        {
            min=tab[i][i+1];
            date_min=tab[i][i];
            i_min=i+1;
        }

        if(max<tab[i][i+1])
        {
            max=tab[i][i+1];
            date_max=tab[i][i];
            i_max=i+1;
        }

    }
    cout<<"Ìèíèìàëüíûé êóðñ "<<min<<" íà "<<date_min<<endl;
    cout<<"Ìàêñèìàëüíûé êóðñ "<<max<<" íà "<<date_max<<endl;

    cout<<"Ââåäèòå ñóììó èíâèñòèöèé"<<endl;
    double s;
    cin>>s;
    double plus;
    plus=s*(max/min)-s;

    cout<<"Âàøà ÷èñòàÿ ïðèáëü ñîñòàâèëà áû "<<plus<<"  y.e."<<endl;

    double NPV,a;
    a=(i_max-i_min)/340; cout<<a<<endl;
    NPV=((s+plus)/pow(1.15,a))-s ;
    cout<<"NPV óêàçàííîãî ïåðèóäà = "<<NPV<<endl;
}