Error in MULTISET module in STLs in C++ course

feedback
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1

My issue

  • Removing an element: s.erase(x);
    • This removes one occurrence of the element x from the multiset, if it exists. If there are multiple occurrences of x, only one of them will be removed.

This is written but when I run the code erase removes all occurrences of x. Please correct this.

Learning course: STLs in C++
Problem Link: Practice Problem in - CodeChef