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제출 #303268

#제출 시각아이디문제언어결과실행 시간메모리
303268model_code비스킷 담기 (IOI20_biscuits)Java
100 / 100
926 ms71120 KiB
// biscuits-yanhao-ac import java.util.HashMap; class biscuits { HashMap<Long, Long> m = new HashMap<>(); long f(long[] s, long x, long n) { if(n<=0) return 0; if(n==1) return 1; if(m.containsKey(n)) { return m.get(n); } int a = 63-Long.numberOfLeadingZeros(n-1); long b = ((long)1)<<a; long c = Math.min(n,1+s[a]/x) - b; long ans = f(s,x,b) + f(s,x,c); m.put(n, f(s,x,b) + f(s,x,c)); return ans; } long count_tastiness(long x, long[] a) { m = new HashMap<>(); long[] b = new long[61]; for(int i=0; i<a.length; i++) { b[i] = a[i]; } for(int i=1; i<a.length; i++) { b[i] = b[i-1] + (b[i]<<i); } for(int i=a.length; i<=60; i++) { b[i] = b[i-1]; } return f(b, x, 1+b[60]); } }
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