Permutations of a string

Permutations of a string.cpp

#include <bits/stdc++.h>

#define MEM(a,b) memset((a),(b),sizeof(a))
#define MAX(a,b) ((a)>(b)?(a):(b))
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MIN3(a,b,c) MIN(MIN(a,b),c)
#define MIN4(a,b,c,d) MIN(MIN(MIN(a,b),c),d)
#define In freopen("In.txt", "r", stdin);
#define Out freopen("out.txt", "w", stdout);

#define i64 long long
#define u64 long long unsigned
#define INF (1<<28)

using namespace std;

int main()
{
    string str;
    cin >> str;
    do
    {
        cout << str << endl;
    }while(next_permutation(str.begin(),str.end()));
    return 0;
}