Cuestionario 2 preg 4

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define MAX 601

int main(){
    char vector[MAX]={};
    char alumno[MAX]={};
    char matriz[3][101]={};
    int num,i,j,k,h,cont,contV,largo1,largo2,largo3;

    scanf("%d",&num);

    for(i=0; i < 3;i++){
        scanf("%101[^\n]",vector);
        cont=0;
        for(j=0; j<MAX; j++){
            if(vector[j] >= 'a' && vector [j] <= 'z'){
                matriz[i][cont] = vector[j];
                cont++;
            }
            if(vector[j] >= 'A' && vector [j] <= 'Z'){
                alumno[cont] = toupper(vector[j]);
                cont++;
            }
        }
    }

    for(i=0; i<num; i++){

        scanf("%101[^\n]",vector);
        cont=0;

        for(j=0; j<MAX; j++){
            if(vector[j] >= 'a' && vector [j] <= 'z'){         //Si el caracter es minuscula se guarda
                alumno[cont] = vector[j];
                cont++;
            }
            if(vector[j] >= 'A' && vector [j] <= 'Z'){         //Si el caracter es mayuscula se aplica toupper()
                alumno[cont] = toupper(vector[j]);             //y se guarda en minuscula
                cont++;
            }
        }
        cont = 0;
        for(k = 0; k < 3; k++){
            largo1 = strlen(matriz[k]);
            largo2 = strlen(vector);
            largo3 = 0;
            for(j = 0; j < largo2-largo1; j++){
                for(h = 0; h > largo2; h++){
                    contV++;
                }
                if(contV == largo1){
                    cont++;
                    largo3 += contV;
                }else{
                    contV = 0;
                }
            }
        }

        for(j = 0;j<3;j++){
            for(k=0;k<largo1;k++){
                printf("%s",matriz[j][k]);
            }
        }
        /*if(largo3 == largo2){
            printf("ACC\n");
        }else{
            printf("WA\n");
        }*/
   }

    return 0;
}