Submission #1303641

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#define OUT(x)                cout << #x << " = " << x << endl; 
#define rep(i, n)             for (int (i) = 0; (i) < (int)(n); (i)++)
#define rer(i, l, r)          for (int (i) = (int)(l); (i) <= (int)(r); (i)++)
#define reu(i, l, r)          for (int (i) = (int)(l); (i) < (int)(r); (i)++)
#define each(i, v)            for (auto i : v)
#define all(x)                (x).begin(), (x).end()
#define rall(x)               (x).rbegin(), (x).rend()
#define pb(x)                 push_back(x)
#define bp(x)                 __builtin_popcount(x)
#define mp(x, y)              make_pair((x), (y))
#define fi                    first
#define se                    second
#define setp(x)               setprecision(x)
#define mset(m, v)            memset(m, v, sizeof(m))
#define sz(x)                 (int)(x.size())
static const int INF        = 0x3f3f3f3f;
static const long long INFL = 0x3f3f3f3f3f3f3f3fLL;
static const int MOD        = 1000000007;
static const double PI      = 3.141592653589793238462643383279;

//#define int                   long long

typedef vector<double>        vd;
typedef vector<string>        vs;
typedef vector<bool>          vb;
typedef vector<int>           vi;
typedef pair<int, int>        pii;
typedef vector<pii>           vpii;

template<typename T> void pv(T a, T b) { for (T i = a; i != b; i ++) cout << *i << " "; cout << endl; }
template<typename T, typename U> inline void amin(T &x, U y) { if (y < x) x = y; }
template<typename T, typename U> inline void amax(T &x, U y) { if (x < y) x = y; }
int in() { int _x; scanf("%d", &_x); return _x; }
long long lin() {long long _x; scanf("%lld", &_x); return _x; };

signed main() { 
        double a, b, c;
        cin >> a >> b >> c;
        auto f = [a, b, c](double t) { return a * t + b * sin(c * t * acos(-1)); };
        double lb = 0.0, ub = 10000.0;
        rep(_, 100) {
                double mid = (lb + ub) / 2.0;
                if (f(mid) < 100) lb = mid;
                else ub = mid;
        }
        cout << setp(30) << ub << endl;
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int in()’:
./Main.cpp:35:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 int in() { int _x; scanf("%d", &_x); return _x; }
                                    ^
./Main.cpp: In function ‘long long int lin()’:
./Main.cpp:36:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 long long lin() {long long _x; scanf("%lld", &_x); return _x; };
                                                  ^

Judge Result