Submission #1835121

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Source Code Expand

#include <algorithm>
#include <cmath>
#include <complex>
#include <cstdio>
using namespace std;
template <class T> inline void setmax(T & a, T const & b) { a = max(a, b); }

double solve1(int x1, int y1, int x2, int y2, int x3, int y3) {
    complex<double> a1(x1 - x3, y1 - y3);
    complex<double> a2(x2 - x3, y2 - y3);
    double arg1 = abs(arg(a1 / a2));
    double arg2 = M_PI - abs(arg((a1 - a2) / a2));
    double scale = abs(a2);
    return scale / (2 + 1 / tan(arg1 / 2) + 1 / tan(arg2 / 2));
}

int main() {
    // input
    int x1, y1; scanf("%d%d", &x1, &y1);
    int x2, y2; scanf("%d%d", &x2, &y2);
    int x3, y3; scanf("%d%d", &x3, &y3);
    // solve
    double result = 0;
    setmax(result, solve1(x1, y1, x2, y2, x3, y3));
    setmax(result, solve1(x2, y2, x3, y3, x1, y1));
    setmax(result, solve1(x3, y3, x1, y1, x2, y2));
    // output
    printf("%.12lf\n", result);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int x1, y1; scanf("%d%d", &x1, &y1);
                                        ^
./Main.cpp:20:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int x2, y2; scanf("%d%d", &x2, &y2);
                                        ^
./Main.cpp:21:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int x3, y3; scanf("%d%d", &x3, &y3);
                                        ^

Judge Result