結果
問題 | No.1664 Unstable f(n) |
ユーザー |
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提出日時 | 2021-09-13 22:58:42 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 3,899 bytes |
コンパイル時間 | 2,583 ms |
コンパイル使用メモリ | 218,872 KB |
最終ジャッジ日時 | 2025-01-24 13:47:55 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 38 |
ソースコード
#pragma GCC optimize("Ofast")#pragma GCC optimize("unroll-loops")#pragma GCC optimize("inline")#include<bits/stdc++.h>using namespace std;template<class T> struct cLtraits_identity{using type = T;};template<class T> using cLtraits_try_make_signed =typename conditional<is_integral<T>::value,make_signed<T>,cLtraits_identity<T>>::type;template <class S, class T> struct cLtraits_common_type{using tS = typename cLtraits_try_make_signed<S>::type;using tT = typename cLtraits_try_make_signed<T>::type;using type = typename common_type<tS,tT>::type;};template<class S, class T> inline auto max_L(S a, T b)-> typename cLtraits_common_type<S,T>::type{return (typename cLtraits_common_type<S,T>::type) a >= (typename cLtraits_common_type<S,T>::type) b ? a : b;}inline int my_getchar_unlocked(){static char buf[1048576];static int s = 1048576;static int e = 1048576;if(s == e && e == 1048576){e = fread_unlocked(buf, 1, 1048576, stdin);s = 0;}if(s == e){return EOF;}return buf[s++];}inline void rd(long long &x){int k;int m=0;x=0;for(;;){k = my_getchar_unlocked();if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){x=k-'0';break;}}for(;;){k = my_getchar_unlocked();if(k<'0'||k>'9'){break;}x=x*10+k-'0';}if(m){x=-x;}}struct MY_WRITER{char buf[1048576];int s;int e;MY_WRITER(){s = 0;e = 1048576;}~MY_WRITER(){if(s){fwrite_unlocked(buf, 1, s, stdout);}}};MY_WRITER MY_WRITER_VAR;void my_putchar_unlocked(int a){if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);MY_WRITER_VAR.s = 0;}MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;}inline void wt_L(char a){my_putchar_unlocked(a);}inline void wt_L(long long x){int s=0;int m=0;char f[20];if(x<0){m=1;x=-x;}while(x){f[s++]=x%10;x/=10;}if(!s){f[s++]=0;}if(m){my_putchar_unlocked('-');}while(s--){my_putchar_unlocked(f[s]+'0');}}template<class T> inline T pow2_L(T a){return a*a;}template<class T> inline T pow3_L(T a){return a*a*a;}template<class T, class S> inline T pow_L(T a, S b){T res = 1;res = 1;for(;;){if(b&1){res *= a;}b >>= 1;if(b==0){break;}a *= a;}return res;}inline double pow_L(double a, double b){return pow(a,b);}template<class S, class T> inline S chmin(S &a, T b){if(a>b){a=b;}return a;}inline long long Isqrt_f_L(const long long n){long long r = sqrt(n);r =max_L(r-2, 0);while((pow2_L((r+1)))<= n ){r++;}return r;}inline long long Icbrt_f_L(const long long n){long long r = pow(n, 1.0/3);r =max_L(r-2, 0);while((pow3_L((r+1)))<= n ){r++;}return r;}inline long long Iroot_f_L(const long long N, const long long k){long long res;if(N<=0){return 0;}if(k==1){return N;}if(k==2){return Isqrt_f_L(N);}if(k==3){return Icbrt_f_L(N);}if(k>=64){return 1;}if(k>=40){if((1LL<<k) <= N){return 2;}return 1;}res = pow(N, 1.0 / k);if(res > 0){res--;}if((pow_L(((double)res+1),k))< 9.2233e18 &&(pow_L((res+1),k))<= N ){res++;}if((pow_L(((double)res+1),k))< 9.2233e18 &&(pow_L((res+1),k))<= N ){res++;}return res;}int main(){long long N;rd(N);long long i;long long j;long long res = N;for(j=(1);j<(60);j++){i =Iroot_f_L(N,j);chmin(res, i + j + (N -(pow_L(i,j))));}wt_L(res);wt_L('\n');return 0;}// cLay version 20210913-1// --- original code ---// ll @N, i, j, res = N;// rep(j,1,60){// i = Iroot(N,j);// res <?= i + j + (N - i**j);// }// wt(res);