#include <stdio.h>
#include <stdlib.h>
 
struct Student {
    int roll;
    char name[50];
    float marks;
};
 
int main() {
    struct Student *students;
    int n, i;
 
    // Step 1: Input number of students
    printf("Enter number of students: ");
    scanf("%d", &n);
 
    // Step 2: Allocate memory dynamically
    students = (struct Student*) malloc(n * sizeof(struct Student));
    if (students == NULL) {
        printf("Memory allocation failed!\n");
        return 1;
    }
 
    // Step 3: Input student details
    printf("\nEnter details of students:\n");
    for (i = 0; i < n; i++) {
        printf("\nStudent %d\n", i + 1);
        printf("Enter Roll No: ");
        scanf("%d", &students[i].roll);
        printf("Enter Name: ");
        scanf(" %[^\n]", students[i].name);  // Read full name with spaces
        printf("Enter Marks: ");
        scanf("%f", &students[i].marks);
    }
 
    // Step 4: Display student details
    printf("\n----- Student Information -----\n");
    for (i = 0; i < n; i++) {
        printf("\nStudent %d:\n", i + 1);
        printf("Roll No: %d\n", students[i].roll);
        printf("Name   : %s\n", students[i].name);
        printf("Marks  : %.2f\n", students[i].marks);
    }
 
    // Step 5: Free dynamically allocated memory
    free(students);
 
    return 0;
}