challenge

#include <stdio.h>
#include <string.h>
/*
    twitter : @yxs
    abady-blackfoxs-team
*/
int main(int argc, char **argv) {
    char *user = "root";
    char pass[30] ={18,60,49,51,59,54,63,72,67,5,1,2,3};
    char flag[30] = {-402, -396, -407, -401, -381, -438, -402, -389, -409, -422, -453, -409, -404, -456, -409, -471, -388, -379};
    char username[30];
    char password[30];
user:
    printf("username : ");
    scanf("%s", username);
    if(strcmp(user,username)==0){
pass:
        printf("password : ");
        scanf("%s", password);
        char password1[] = {0};
        int i = 0;
        for (i=0; i<strlen(password); i++)
        {
            password1[i] = ((int)password[i] ) - 48;
        }
        if(memcmp(pass,password1,strlen(pass)-1) == 0)
        {
            int summ = 0,ii = 0;
            printf("flag: ");
            for (int ii = 0; ii < strlen(password1)-1; ii++)
            {
                summ += password1[ii];
            }
            for (int iii = 0; iii < strlen(flag); iii++)
            {
                printf("%c", (flag[iii]+summ));
            }
        }else{
            printf("username and password not match :(\n");
            goto pass;
        }
    }else{
        printf("user not found !\n");
        goto user;
    }
    return 0;

}