Problem 1

#include <stdio.h>

int main() {
    int c = 3, s = 8;
    int list[3][8];
    list[0][0] = 1;
    list[0][1] = 0;
    list[0][2] = 1;
    list[0][3] = 0;
    list[0][4] = 1;
    list[0][5] = 1;
    list[0][6] = 1;
    list[0][7] = 0;
    list[1][0] = 1;
    list[1][1] = 0;
    list[1][2] = 0;
    list[1][3] = 1;
    list[1][4] = 1;
    list[1][5] = 0;
    list[1][6] = 1;
    list[1][7] = 0;
    list[2][0] = 1;
    list[2][1] = 1;
    list[2][2] = 1;
    list[2][3] = 1;
    list[2][4] = 0;
    list[2][5] = 1;
    list[2][6] = 1;
    list[2][7] = 0;


    printf("Student who have the most number in the class is: ");
    int ans = 0, index = 0;
    for (int i = 0; i < c; i++) {
        int sum = 0;
        for (int j = 0; j < s; j++) {
            sum += list[i][j];
        }
        if (ans < sum) {
            ans = sum;
            index = i;
        }
    }
    printf("%d\n", index);

    printf("Student who have enrolled in all the classes are:\n");
    for (int i = 0; i < s; i++) {
        int sum = 0;
        for (int j = 0; j < c; j++) {
            sum += list[j][i];
        }
        if (sum == c) {
            printf("%d ", i);
        }
    }
    printf("\n");
}