#include<iostream> using namespace std; int main(){ double pi=3.14159; int h,r; cin >> h >> r; double V=pihr*r; int t=20000/V+1; cout << t << endl; return 0; }

#include<iostream> using namespace std; int main(){ double pi=3.14159; int h,r; cin >> h >> r; double V=pihr*r; int t=20000/V+1; cout << t << endl; return 0; }

#include<iostream> using namespace std; int main(){ double pi=3.14159; int h,r; cin >> h >> r; double V=pihr*r; int t=20000/V+1; cout << t << endl; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ double a,b,c; cin>>a>>b; c=abb*3.14159; cout<<ceil(20000/c); return 0; }

#include <bits/stdc++.h> using namespace std; int main(){ double t1,h,r,t2; cin >> h >> r; t1=rr3.14159*h; cout << ceil(20000/t1); return 0; }

#include<iostream> using namespace std; int main(){ double pi=3.14159; int h,r; cin >> h >> r; double V=hrr*pi; int t=20000/V+1; cout << t << endl; return 0; }

要知道： 1L=1000ml=1000立方厘米； S桶=底面积*高。 so： #include<bits/stdc++.h> using namespace std; int main() { int h, r; cin >> h >> r; double V = rr3.14159*h; cout<<ceil(20000/V); return 0; }

吠常简单！！！

不用万能头

#include <iostream> #include <cmath> using namespace std; int num(int r, int h) { double sum = r * r * M_PI * h; int m = ceil(20000 / sum); return m; } int main() { int r, h; cin >> h >> r; cout << num(r, h) << endl; return 0; }