Team and Fight Randomizer in C

I'm trying to make a program, which puts a given amount of players in a given amount of teams. Afterwards they should be randomly chosen (eg. you roll the "dice" and Team 3's Player 42 and shall fight against Team 4's Player 22 (All the players are randomly put in the different teams, which are limited to the choice of the Gamemaster)).

In my code I have the basic output and structure. It says something like:

Team 1 now owns Player 43 Team 2 now owns Player 12 Team 4 now owns Player 1 Team 3 now owns Player 54

But my question is, how - based on the code - I could save this information and how can I (afterwards) let the players randomly fight? Members of the same team should NOT be able to fight each other and after each fight I want the players (if they lose in what ever game this gets translated into) to be somehow on a "blacklist" where they can't be rolled anymore.

My code so far

#include<stdio.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
        int mitglieder, teams, teameins = 0, teamzwei = 0, teamdrei = 0, teamvier = 0;
        printf("Teamcreation\n");
        printf("\nNumber of Players: ");
        scanf("%d", &mitglieder);
        printf("\nNumber of Teams: ");
        scanf("%d", &teams);
        printf("\nThere are ");
        printf("%d", mitglieder);
        printf(" Player in ");
        printf("%d", teams);
        printf(" Teams. \n");

        int array[mitglieder];

                for (int i = 0; i < mitglieder; i++) {     // fill array
                    array[i] = i;
                    
                }
                printf("The Player are in the following Teams: \n ");
                
                for (int i = 0; i < mitglieder; i++) {    // shuffle array
                    int temp = array[i];
                    int randomIndex = rand() % mitglieder;
                
                    array[i]           = array[randomIndex];
                    array[randomIndex] = temp;
                }
                
                
                for (int i = 0; i < mitglieder; i++) {    // print array
                        int random_number = rand() % teams + 1;
                        int tp = random_number;
                        if(tp == 1) {
                                        teameins+1;
                                        }else 
                                            if(tp == 2 ) {
                                                teamzwei+1;
                                            }else 
                                            if(tp == 3 ) {
                                                teamdrei+1;
                                            }else 
                                            if(tp == 4 ) {
                                                teamvier+1;
                                            
                                            }
                    printf("Team %d - Spieler: %d\n ",random_number,array[i] + 1);              
                }
                
                        if( (teamvier == 0) && (teamdrei == 0) ) {
                        printf("\n%d Mitglieder in Team 1 und %d Mitglieder in Team2",teameins,teamzwei);
                }else
                        if( (teamvier == 0) && (teamdrei < 0) ) {
                        printf("\n%d Mitglieder in Team 1, %d Mitglieder in Team2 und %d Mitglieder in Team3.",teameins,teamzwei,teamdrei);
                }else
                        if(teamvier < 0) {
                        printf("\n%d Mitglieder in Team 1, %d Mitglieder in Team2, %d Mitglieder in Team 3 und %d Mitglieder in Team4.",teameins,teamzwei,teamdrei,teamvier);
                        }
        return 0;
}