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#include <iostream> #include <bits/stdc++.h> #include <algorithm> using namespace std; static inline long long folds(unsigned long long x, unsigned long long lim){ long long cnt = 0; while (x > lim){ x = (x+1)/2; ++cnt; } return cnt; } int main() { unsigned long long n,m,h,w; if (!(cin>>n >>m >>h >> w)) return 0; unsigned long long f1 = folds(n,h) + folds(m,w); unsigned long long f2 = folds(n,w) + folds(m,h); cout << min(f1,f2) << "\n"; return 0; }
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