Ошибка при копировании элементов структуры

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
typedef struct {
    char name[50];
    char surname[50];
    char subject[50][50];
    int grade[50];
    int numSubjects;
} Student;
 
void addStudent(Student* students, int* numStudents, char name[], char surname[], char subject[], int grade) {
    strcpy(students[*numStudents].name, name);
    strcpy(students[*numStudents].surname, surname);
    strcpy(students[*numStudents].subject[students[*numStudents].numSubjects], subject);
    students[*numStudents].grade[students[*numStudents].numSubjects] = grade;
    students[*numStudents].numSubjects++;
    (*numStudents)++;
}
 
 
 
int main() {
    char name[50];
    char surname[50];
    char subject[50];
    int grade = 0;
 
    Student students[100];
    int numStudents = 0;
    printf("%d");
    scanf("%s", name);
 
    printf("Enter surname: ");
    scanf("%s", surname);
 
    printf("Enter subject: ");
    scanf("%s", subject);
 
    printf("Enter grade: ");
    scanf("%d", &grade);
 
    addStudent(students, &numStudents, name, surname, subject, grade);
 
    return 0;
}