#include<stdio.h>
#include<math.h>
int i;
void cal(int x, int n, int *s, int *s1, float *s2){
	//s1
	for(i = 0; i <= n; i++){
		*s += pow(x, i);
	}
	//s2
	for(i = 0; i <= n; i++){
		if(i % 2 == 0){
			*s1 += pow(x, i);
		}
		else{
			*s1 -= pow(x, i);
		}
	}
	//s3
	for(i = 1; i <= n; i++){
		*s2 += (float) pow(x, i)/giaiThua(i);
	}
}
void input(int *n, int *x){
	printf("nhap n: ");
	scanf("%d", &*n);
	printf("nhap x: ");
	scanf("%d", &*x);
}
int giaiThua(int a){
	if(a == 0 || a == 1){
		return 1;
	}
	else{
		return a*giaiThua(a-1);
	}
}
int main(){
	int x, n;
	int *s;
	int *s1;
	float *s2;
	s = 0;
	s1 = 0;
	s2 = 0;
	input(&n, &x);
	cal(x, n, &s, &s1, &s2);
	printf("S = %d\nS1 = %d\nS2 = %f", s, s1, s2);
	return 0;
}
//S = 1 + x + x^2 + x^3 + … + x^n.
//S1 = 1 - x + x^2 -x^3 +…. + (-1)n^x^n
//S2 = 1 + x/1! + x^2/2! + x^3/3! + …. + x^n/n!