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language:	C++ 4.7.2 (gcc-4.7.2)
date:	454 days 22 hours ago
link:
visibility:	public private user's deleted

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#include <iostream>
#include <algorithm>
#include <vector>
 
int main() {
    int n, r;
    std::cin >> n;
    std::cin >> r;
 
    std::vector<bool> v(n);
    for (int i = 0; i < n; ++i) {
        v[i] = (i >= (n - r));
    }
 
    do {
        for (int i = 0; i < n; ++i) {
            if (v[i]) {
                std::cout << (i+1) << " ";
            }
        }
        std::cout << "\n";
    } while (std::next_permutation(v.begin(), v.end()));
}

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# 4 # 3 # 2 # 1

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# 4: hide show clone input 85 days 21 hours ago Success

result: Success time: 0s memory: 2988 kB returned value: 0
input:
```
5 2
```
output:
```
4 5 
3 5 
3 4 
2 5 
2 4 
2 3 
1 5 
1 4 
1 3 
1 2 
```
# 3: hide show clone input 202 days 17 hours ago Success

result: Success time: 0.02s memory: 2860 kB returned value: 0
input:
```
6 3
```
output:
```
4 5 6 
3 5 6 
3 4 6 
3 4 5 
2 5 6 
2 4 6 
2 4 5 
2 3 6 
2 3 5 
2 3 4 
1 5 6 
1 4 6 
1 4 5 
1 3 6 
1 3 5 
1 3 4 
1 2 6 
1 2 5 
1 2 4 
1 2 3 
```
# 2: hide show clone input 202 days 17 hours ago Success

result: Success time: 0.01s memory: 2816 kB returned value: 0
input:
```
8 2
```
output:
```
7 8 
6 8 
6 7 
5 8 
5 7 
5 6 
4 8 
4 7 
4 6 
4 5 
3 8 
3 7 
3 6 
3 5 
3 4 
2 8 
2 7 
2 6 
2 5 
2 4 
2 3 
1 8 
1 7 
1 6 
1 5 
1 4 
1 3 
1 2 
```
# 1: hide show clone input 454 days 22 hours ago Success

result: Success time: 0.01s memory: 2860 kB returned value: 0
input:
```
5 3
```
output:
```
3 4 5 
2 4 5 
2 3 5 
2 3 4 
1 4 5 
1 3 5 
1 3 4 
1 2 5 
1 2 4 
1 2 3 
```

author's note

show 3 element combinations of {1, 2, 3, 4, 5}

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