第一部分
find(beg, end, val) equal(beg1, end, beg2) min(val1, val2) max(val1, val2) min_element(beg, end)
1. find(beg, end, val)
2. equal(beg1, end, beg2)
3. min(val1, val2)
4. max(val1, val2)
5. min_element(beg, end)
6. max_element(beg, end)
find(beg, end, val) equal(beg1, end, beg2) min(val1, val2) max(val1, val2) min_element(beg, end)
1. find(beg, end, val)
2. equal(beg1, end, beg2)
3. min(val1, val2)
4. max(val1, val2)
5. min_element(beg, end)
6. max_element(beg, end)