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

1001. A+B Format (20)

时间限制

400 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

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

刚开学，事情比较多，接下来也要去考一发pat，就下来休闲一下刷刷水题。

虽然pat甲级的题是挺水的，但是很多题目不给数据范围，坑点真的有点多。

#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;
}