1.c

#include <stdio.h>

int factorial(int n) {
    int fac = 1;

    for (int i = 1; i <= n; i++){
        fac = fac * i;
    }
    return fac;
}

int main(){
    int n;
    scanf("%d", &n);

    int sum = 0;

    printf("1!/1 ");
    sum += factorial(1) / 1;

    for (int i = 2; i <= n; i++) {
        printf("+ %d!/%d ", i, i);
        sum += factorial(i) / i;
    }

    printf(" = %d\n", sum);
}