UVa 10868

#include <bits/stdc++.h>
using namespace std;

#define eps             1e-9

int main(){
    #ifdef ERFANUL007
        clock_t tStart = clock();
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif

    double k, l, s, w, g = 9.81, vsq;

    while(cin >> k >> l >> s >> w){
        if(k + l + s + w < eps) break;

        double dis = max(0.0, s-l);
        vsq = 2.0 * g * s - k * dis * dis / w;

        if(vsq < -eps) cout << "Stuck in the air.\n";
        else if(vsq <= 100.0) cout << "James Bond survives.\n";
        else cout << "Killed by the impact.\n";
    }

    #ifdef ERFANUL007
        fprintf(stderr, "\n>> Runtime: %.10fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
    #endif

    return 0;
}

/*
F = ma
F * s = 0.5 * m * v * v
m * a * s = 0.5 * m * v * v
v * v = 2 * a * s
F * s = 0.5 * k * dl * dl (dl = v)
v * v = k * dl * dl / m
so v * v = 2 * a * s - k * dl * dl
*/