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OI-codes/Luogu/T160508/T160508.cpp

25 lines
575 B
C++

#include <bits/stdc++.h>
using namespace std;
int main() {
int score;
double gpa = 0.0;
cin >> score;
if (score >= 90) {
gpa = 4.0;
} else if (60 <= score && score <= 89) {
gpa = 4.0 - (90 - score) * 0.1;
} else {
if (floor(sqrt(score) * 10.0) >= 90.0) {
gpa = 4.0;
} else if (floor(sqrt(score) * 10.0) >= 60.0) {
gpa = 4.0 - (90.0 - floor(sqrt(score) * 10.0)) * 0.1;
} else {
gpa = 0.0;
}
}
cout << fixed << setprecision(1) << gpa << endl;
return 0;
}