poj 1299 Polar Explorer

#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>using namespace std;#define pi 3.14159bool reachable(int x, int y, int z, int &ans){    if (360 - z < z)        z = 360 - z;    if (z == 0)    {        ans = y;        return true;    }    double dist = 2 * pi * x * z / 360;    double fuel_need = dist * 2 / 5;    if (y >= fuel_need)    {        ans = y - fuel_need;        return true;    }    ans = y * 5;    return false;}int main(){    char st[20];    int x, y, z;    int ans;    while (1)    {        gets(st);        if (st[0] == 'E') break;        scanf("%d%d%d", &x, &y, &z);        if (reachable(x, y, z, ans)) printf("YES %dn", ans);        else printf("NO %dn", ans);        gets(st);        gets(st);    }    return 0;}