int Zadacha_1(int A, int N){
      int result = 1 - A;
      bool min = false;
      for(int i = 2; i<N; i++){
          if(min){
              result = result - ( A * i );
              min = false;   
          }
          else{
              result = result + ( A * i );
              min = true;   
          }
      }
      return result;
}

//Без math.h
int Zadacha_2(int A, int N){
      int r = A;
      for(int i=0; i<N; i++) r = r * N;
      return r;
}

//Задача 3
int a=5;
int b=8;
for (int i=a;i<=b;i++)
{
  for (int j=1;j<=i;j++){cout<<i<<" ";}
}

//Задача 4
float S=1000;
float P=3;
int NumberOfMonth=0;
do
{
  S*=1+P/100;
  NumberOfMonth++;
} while (S<1100);
cout<<"Number of month: "<<NumberOfMonth<<endl;
cout<<"Deposit: "<<S;

//Задача 5:
double Sum=0, A=6, K=1;
do
{
  Sum+=1/K;
  K++;
} while (Sum<A);
cout<<"K = "<<K<<endl;
cout<<"Sum = "<<Sum<<endl;

//Задача № 1
double A=1.75,Result=1;
unsigned int N=25;
for (int i=1,Sign=1;i<=N;i++,Sign=-Sign)
{
     Result-=Sign*A*i;
}

//Задача № 2
double A=3.14,Result=A;
unsigned int N=10;
for (int i=2;i<=N;i++)
{
     Result*=A;
}