#include "iostream"
#include "set"
int main(int argc, char *argv[]) {
// 计算setABC,然后把他们合并起来作count
int setA[21], setB[21], setC[21];
int count = 0;
int indexA = 0, indexB = 0, indexC = 0;
//不能在这个for循环遍历的时候,判断放炮时间是否相同,时间是线性的,但是他们有的慢,有的快。
for (int i = 0; i < 21; ++i) {
setA[i] = indexA;
setB[i] = indexB;
setC[i] = indexC;
indexA += 5;
indexB += 6;
indexC += 7;
}
//unify这个三个集合
std::set<int> Union;
for (int i = 0; i < 21; ++i) {
Union.insert(setA[i]);
Union.insert(setB[i]);
Union.insert(setC[i]);
}
std::cout<<Union.size();
return 0;
}