UVa/uva-10341.cpp at master · debugster/UVa · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
//#include <bits/stdc++.h>
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <vector>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <queue>
#include <deque>
#include <stack>
#include <list>
#include <bitset>
#include <string>
#include <utility>
#include <iterator>
#include <fstream>
#include <sstream>
#include <numeric>
#include <functional>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <cctype>
#include <climits>
#include <ctime>
#include <cassert>

using namespace std;

/* typedef starts */

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;

/* typedef ends */

/* macro starts */

#define PI acos(-1.0)
#define EPS 1e-9
#define fastIO ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define sinD(degree) sin((degree * PI) / 180.0)
#define cosD(degree) cos((degree * PI) / 180.0)
#define tanD(degree) tan((degree * PI) / 180.0)
#define cotD(degree) (1.0 / tanD(degree))
#define secD(degree) (1.0 / cosD(degree))
#define cosecD(degree) (1.0 / sinD(degree))
#define asinD(value) (asin(value) * 180.0) / PI
#define acosD(value) (acos(value) * 180.0) / PI
#define atanD(value) (atan(value) * 180.0) / PI

/* macro ends */

/* function starts */

/// calculates n-th (0-based) Gray Code
template<typename dataType>
dataType nthGrayCode(dataType n)
{
    return (n ^ (n >> 1));
}

/// generates all possible subsets for the given set
template<typename dataType>
void generateAllSubset(vector<dataType> &data)
{
    int i, j, n;
    n = data.size();

    for (i = 0; i < (1 << n); i++) {
        for (j = 0; j < n; j++) {
            if (i & (1 << j)) {
                cout << data[j] << " ";
            }
        }
        cout << "\n";
    }
}

/* function ends */

double p, q, r, s, t, u;

double fX(double x)
{
    double ans;
    ans = (p * exp(-x)) + (q * sin(x)) + (r * cos(x)) + (s * tan(x)) + (t * x * x) + u;
    return ans;
}

int main()
{
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    fastIO;

    double x, x1, x2;

    while (cin >> p >> q >> r >> s >> t >> u) {

        x1 = 1;
        x2 = 0;

        if (fX(x1) * fX(x2) > 0) {
            cout << "No solution\n";
        }
        else {
            while (true) {
                if (fabs(x2 - x1) < EPS) {
                    x = (x1 + x2) / 2;
                    break;
                }

                x = (x1 + x2) / 2;
                if (fX(x) * fX(x1) > 0) {
                    x1 = x;
                }
                else {
                    x2 = x;
                }
            }
            cout << setprecision(4) << fixed << x << "\n";
        }
    }

    return 0;
}