#include<stdio.h>
#include<stdlib.h>
int main()
{
int n = 0;
int ret = 0;
scanf("%d",&n);
ret = fib(n);
printf("%d\n", ret);
system("pause");
return 0;
}
int main()
{
int i = 0;
int n = 0;
int sum = 0;
int j = 1;
int p = 0;
scanf("%d", &n);
for (i = 1; i <=n; i++)
{
p = 1;
for (j = 1; j <=i; j++)
{
p = p*j;
}
sum = sum + p;
}
printf("sum = %d\n", sum);
system("pause");
return 0;
}
#include<stdio.h>
#include<stdlib.h>
int fib(int n)
{
int a = 1;
int b = 1;
int c = 1;
while (n > 2)
{
c = a + b;
a = b;
b = c;
n--;
}
return c;
}
int main()
{
int ret = 0;
int n = 0;
scanf("%d", &n);
ret = fib(n);
printf("%d", ret);
system("pause");
}