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read doubles faster in cpp
Just wanted to share this after watching many submissions for Ezzat and Two Subsequences TLEing because they used doubles.
Use
string s;
cin >> s;
double x = stod(s);
instead of
double x;
cin >> x;
Found this trick hidden in algo-lib template after we were wondering why https://codeforces.com/contest/1557/submission/125408355 is so fast even after using doubles.
