# UVA 10341 Solve It

Problem F
Solve It
Input: standard input
Output: standard output
Time Limit: 1 second
Memory Limit: 32 MB
Solve the equation:
p*e-x + q*sin(x) + r*cos(x) + s*tan(x) + t*x2 + u = 0
where 0 <= x <= 1.
Input
Input consists of multiple test cases and terminated by an EOF. Each test case consists of
6 integers in a single line: p, q, r, s, t and u (where 0 <= p,r <= 20 and -20 <=
q,s,t <= 0). There will be maximum 2100 lines in the input file.
Output
For each set of input, there should be a line containing the value of x, correct upto 4
decimal places, or the string "No solution", whichever is applicable.
Sample Input
0 0 0 0 -2 1
1 0 0 0 -1 2
1 -1 1 -1 -1 1
Sample Output
0.7071
No solution
0.7554

```#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;

const double esp=1e-8;

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

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

double find(double x,double y)
{
while (y-x>esp)
{
double m=x+(y-x)/2;
if (get_value(m)-esp>0) x=m;
else y=m;
}
return x;
}

int main()
{
while (scanf("%lf%lf%lf%lf%lf%lf",&p,&q,&r,&s,&t,&u)!=EOF)
{
if (get_value(0.0)<0 || get_value(1.0)>0)
printf("No solution\n");
else
printf("%.4lf\n",find(0.0,1.0));
}
return 0;
}```

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UVA 10341 Solve It

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