Problem p02401 (C++)

Buggy submission (status: Time Limit Exceeded):
/*
    ????????°??§???????????¨????????????
*/

#include <algorithm>
#include <ctype.h>
#include <iostream>
#include <iterator>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <time.h>
#include <vector>
#define LLU unsigned long long int
#define LL long long int
#define LD long double
using namespace std;
#define LLUmax ULLONG_MAX
#define LLmax LLONG_MAX
#define dmax INT_MAX
#define vd vector<int>
#define vLL vector<long long int>
#define vLLU vector<unsigned long long int>
#define pb push_back
#define mp make_pair
#define fi first
#define sec second
#define debug printf("asd\n")
#define debugd(a) printf("--%d\n", a)
#define debugdd(a, b) printf("--%d %d\n", a, b)
#define debugarr(a, b)                                                         \
  for (int i = 0; i < b; i++)                                                  \
    printf("%d ", a[i]);                                                       \
  printf("\n")
#define newline printf("\n")
#define forin(a, b, c) for (int a = b; a < c; a++)
#define forde(a, b, c) for (int a = b; a < c; a--)

inline void scd(int &a) { scanf("%d", &a); }
inline void scdd(int &a, int &b) { scanf("%d %d", &a, &b); }
inline void sctd(int &a, int &b, int &c) { scanf("%d %d %d", &a, &b, &c); }
inline void scdlld(long int &a, long int &b) { scanf("%I64d %I64d", &a, &b); }
inline void sclld(long long int &a) { scanf("%I64d", &a); }

#define scarrd(a, b)                                                           \
  for (int i = 0; i < b; i++)                                                  \
  scanf("%d", &a[i])
#define prdlld(a, b) printf("%I64d %I64d", a, b)
#define prdd(a, b) printf("%d %d", a, b)
#define prd(a) printf("%d", a)
#define prarr(a, b)                                                            \
  for (int i = 0; i < b; i++)                                                  \
  printf("%d ", a[i])
#define iniarr(a, b)                                                           \
  for (int i = 0; i < b; i++)                                                  \
  a[i] = 0
#define arr(a, b) int *a = (int *)malloc(b * sizeof(int))
#define llarr(a, b)                                                            \
  long long int *a = (long long int *)malloc(b * sizeof(long long int))
#define st(a, b) char *a = (char *)malloc(b * sizeof(char))
#define grav 9.8
#define pi 3.14159265

int main() {
  LL a, c;
  char b;
  scanf("%lld %c %lld", &a, &b, &c);
  while (a != 0 || b != '?' || c != 0) {
    if (b == '+')
      printf("%lld\n", a + c);
    else if (b == '-')
      printf("%lld\n", a - c);
    else if (b == '*')
      printf("%lld\n", a * c);
    else if (b == '/')
      printf("%lld\n", a / c);
    scanf("%lld %c %lld", &a, &b, &c);
  }
  return 0;
}

Fixed submission:
/*
    ????????°??§???????????¨????????????
*/

#include <algorithm>
#include <ctype.h>
#include <iostream>
#include <iterator>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <time.h>
#include <vector>
#define LLU unsigned long long int
#define LL long long int
#define LD long double
using namespace std;
#define LLUmax ULLONG_MAX
#define LLmax LLONG_MAX
#define dmax INT_MAX
#define vd vector<int>
#define vLL vector<long long int>
#define vLLU vector<unsigned long long int>
#define pb push_back
#define mp make_pair
#define fi first
#define sec second
#define debug printf("asd\n")
#define debugd(a) printf("--%d\n", a)
#define debugdd(a, b) printf("--%d %d\n", a, b)
#define debugarr(a, b)                                                         \
  for (int i = 0; i < b; i++)                                                  \
    printf("%d ", a[i]);                                                       \
  printf("\n")
#define newline printf("\n")
#define forin(a, b, c) for (int a = b; a < c; a++)
#define forde(a, b, c) for (int a = b; a < c; a--)

inline void scd(int &a) { scanf("%d", &a); }
inline void scdd(int &a, int &b) { scanf("%d %d", &a, &b); }
inline void sctd(int &a, int &b, int &c) { scanf("%d %d %d", &a, &b, &c); }
inline void scdlld(long int &a, long int &b) { scanf("%I64d %I64d", &a, &b); }
inline void sclld(long long int &a) { scanf("%I64d", &a); }

#define scarrd(a, b)                                                           \
  for (int i = 0; i < b; i++)                                                  \
  scanf("%d", &a[i])
#define prdlld(a, b) printf("%I64d %I64d", a, b)
#define prdd(a, b) printf("%d %d", a, b)
#define prd(a) printf("%d", a)
#define prarr(a, b)                                                            \
  for (int i = 0; i < b; i++)                                                  \
  printf("%d ", a[i])
#define iniarr(a, b)                                                           \
  for (int i = 0; i < b; i++)                                                  \
  a[i] = 0
#define arr(a, b) int *a = (int *)malloc(b * sizeof(int))
#define llarr(a, b)                                                            \
  long long int *a = (long long int *)malloc(b * sizeof(long long int))
#define st(a, b) char *a = (char *)malloc(b * sizeof(char))
#define grav 9.8
#define pi 3.14159265

int main() {
  LL a, c;
  char b;
  scanf("%lld %c %lld", &a, &b, &c);
  while (b != '?') {
    if (b == '+')
      printf("%lld\n", a + c);
    else if (b == '-')
      printf("%lld\n", a - c);
    else if (b == '*')
      printf("%lld\n", a * c);
    else if (b == '/')
      printf("%lld\n", a / c);
    scanf("%lld %c %lld", &a, &b, &c);
  }
  return 0;
}