Submission #1243491

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243491		sigma	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

std::string press(std::string p);

std::string guess_sequence(int N) {
    std::string s = "";
    std::string x = "abxy";
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < 4; j++) {
            s.push_back(x[j]);
            if (press(s) == i+1) break;
            else s.pop_back();
        }
    }
    return s;
}

Compilation message (stderr)

combo.cpp:1:6: error: 'string' in namespace 'std' does not name a type
    1 | std::string press(std::string p);
      |      ^~~~~~
combo.cpp:1:1: note: 'std::string' is defined in header '<string>'; did you forget to '#include <string>'?
  +++ |+#include <string>
    1 | std::string press(std::string p);
combo.cpp:3:6: error: 'string' in namespace 'std' does not name a type
    3 | std::string guess_sequence(int N) {
      |      ^~~~~~
combo.cpp:3:1: note: 'std::string' is defined in header '<string>'; did you forget to '#include <string>'?
    3 | std::string guess_sequence(int N) {
      | ^~~