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Print reverese string non repeated chars
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//Title of this code #include <iostream> #include <string> using namespace std; void setFlag(char c, int& n) { int i = c - 'a'; n |= 1 << i; } bool getFlag(char c, int n) { int i = c - 'a'; return n & (1 << i); } void printReverseString(const string& s) { int n = 0; for (int i = s.length() - 1; i >= 0; --i) { if (!getFlag(s[i], n)) { cout << s[i]; setFlag(s[i], n); } } cout << endl; } int main() { printReverseString("abbcaad"); }
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Compilation time: 0.3 sec, absolute running time: 0.04 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.35 sec
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