PAT (Advanced Level) Practise 1001 A+B Format (20)

1001. A+B Format (20)

時間限制

400 ms

記憶體限制

65536 kB

代碼長度限制

16000 B

判題程式

Standard

作者

CHEN, Yue

Calculate a + b and output the sum in standard format -- that is, the digits must be separated into groups of three by commas (unless there are less than four digits).

Input

Each input file contains one test case. Each case contains a pair of integers a and b where -1000000 <= a, b <= 1000000. The numbers are separated by a space.

Output

For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.

Sample Input

-1000000 9

Sample Output

-999,991

剛開學，事情比較多，接下來也要去考一發pat，就下來休閑一下刷刷水題。

雖然pat甲級的題是挺水的，但是很多題目不給資料範圍，坑點真的有點多。

#include<cstdio>
#include<cstring>
#include<cmath>
#include<queue>
#include<vector>
#include<map>
#include<iostream>
#include<stack>
#include<algorithm>
#include<bitset>
#include<functional>
#include<ctime>
using namespace std;
typedef unsigned long long ull;
typedef long long LL;
const int maxn = 1e3 + 10;
const int INF = 0x7FFFFFFF;
int a, b, c, flag, s[maxn], tot = 0;

int main()
{
  scanf("%d%d", &a, &b);
  c = a + b;  if (c < 0) { flag = 1; c = -c; }
  while (c) s[tot++] = c % 10, c /= 10;
  if (flag) printf("-");
  for (int i = tot - 1; i >= 0; i--)
  {
    printf("%d", s[i]);
    if (i % 3 == 0 && i) printf(",");
  }
  if (!tot) printf("0");
  printf("\n");
  return 0;
}