1.c

#include<stdio.h>

int main () {


    int element;
    printf("How many element you want?\n");
    scanf("%d",&element);
    int a[element];
    int x,i,j,o,got = 0;
    printf("What is your expected Sumation?\n");
    scanf("%d",&x);

    printf("please insert array elements here \n");

    for (o = 0; o < element; o++) {
        scanf("%d",&a[o]);
    }

    for (i=0; i < (element - 1); i++) {

            for (j = (i+1); j < element; j++) {

                   if ( x == (a[i] + a[j]) ) {
                        got = 1;
                   }

            }
    }


    if (got == 1) {

        printf("Exists");

        } else {

        printf("NONE");
    }

    return 0;
}