• Your Song It's a little bit funny, this feeling insideI'm not one of those who can easily hideI don't have much money, but zhi if I didI'd buy a big house where we both could liveSo excuse me forgett...
Your Song
It's a little bit funny, this feeling insideI'm not one of those who can easily hideI don't have much money, but zhi if I didI'd buy a big house where we both could liveSo excuse me forgetting, but these things I doSee I've forgotten if they're green or they're blueAnyway the thing is what I really meanYours are the sweetest eyes I've ever seenAnd you can tell everybody this is your songIt may be quite simple, but now that it's doneI hope you don't mind, I hope you don't mind that I put down in wordsHow wonderful life is now you're in the worldIf I was a sculptor, but then again noOr a boy who makes potions in a traveling showI know it's not much, but it's the best I can doMy gift is my song, and this one's for youAnd you can tell everybody this is your songIt may be quite simple, but now that it's doneI hope you don't mind, I hope you don't mind that I put down in wordsHow wonderful life is now you're in the world
转载于:https://www.cnblogs.com/jojodru/archive/2012/09/27/2705828.html
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• you can tell everybody this is your song  你可以告诉大家这首歌是属于你的歌  it may be quite simple but now that it's done  也许歌词 , 旋律很简单 但是我已将它写完了  i...

It's a little bit funny, this feeling inside 内心觉得这有点好笑 I'm not one of those who can easily hide 我不是能轻易隐藏情绪的人 I don't have much money. But boy if I did 我没有很多的钱，但是如果我有 I'd buy a big house where we both could live 我买一栋我们两人住的大房子 If I was a sculptor, but then again no 如果我是雕刻家 Or a man who makes potions in a traveling show 或是个巡回表演的魔术师 然而我都不是 I know it's not much but it's the best I can do 我知道这样不够 但我已尽力了 【my gift is my song and this one is for you 我的礼物就是我的歌 这一首歌是献给你的 you can tell everybody this is your song 你可以告诉大家这首歌是属于你的歌 it may be quite simple but now that it's done 也许歌词,旋律很简单 但是我已将它写完了 i hope you don't mind 我希望你不要介意 i hope you don't mind that i put down in words 希望你不要介意我以文字记述下来 how wonderful life is while you're in the world 世上有了你 生活多么美好 I sat on the roof and I kicked off the moss 我坐在屋顶，脚踢着青苔 Well a few of the verses well 脑海中浮现出一些韵律 they've got me quite cross 令我不太高兴 But the sun's been kind 但是阳光和熙 while I wrote this song 在我写下这首歌的时候 It's some people like you that keep it turn to 只有像你这样的人才能令这首歌动听So excuse me forgetting, but these things I do 原谅我的遗忘 但是我现在要做的事情 You see I've forgotten if they're green or they're blue 你看 我已忘记了你的眼睛是绿色还是蓝色的了 Anyway the thing is what I really mean 不管怎样 我的意思是 Yours are the sweetest eyes I've ever seen 你的眼睛是我见过的最美的眼睛 and you can tell everybody this is your song 你可以告诉大家这首歌是属于你的歌 it may be quite simple but now that it's done 也许很简单 但是我已将它写完了 I hope you don't mind 我希望你不要介意 I hope you don't mind that i put down in words 希望你不要介意我以文字记述下来 how wonderful life is while you're in the world 世上有了你 生活多么美好】 I hope you don't mind 我希望你不要介意 I hope you don't mind that i put down in words 希望你不要介意我以文字记述下来 how wonderful life is while you're in the world 世上有了你 生活多么美好


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• And you can tell everybody this is your song It may be quite simple, but now that it's done I hope you don't mind, I hope you don't mind that I put down in words How wonderful life is now you're in ...
It's a little bit funny, this feeling insideI'm not one of those who can easily hideI don't have much money, but boy if I didI'd buy a big house where we both could liveSo excuse me forgetting, but these things I doSee I've forgotten if they're green or they're blueAnyway the thing is what I really meanYours are the sweetest eyes I've ever seenAnd you can tell everybody this is your songIt may be quite simple, but now that it's doneI hope you don't mind, I hope you don't mind that I put down in wordsHow wonderful life is now you're in the worldIf I was a sculptor, but then again noOr a girl who makes potions in a traveling showI know it's not much, but it's the best I can doMy gift is my song, and this one's for youAnd you can tell everybody this is your songIt may be quite simple, but now that it's doneI hope you don't mind, I hope you don't mind that I put down in wordsHow wonderful life is now you're in the world
转载于:https://www.cnblogs.com/jojodru/archive/2012/06/01/2530473.html
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• <div><p><code>Fetch Ratings Error: Unable to fetch your song ratings.</code> arises multiple times upon opening my Firefox browser on Ubuntu 18.04.2 LTS. </p><p>该提问来源于开源项目：zachomedia/...
• s more informative to show an error that a song is already in your queue when it also cannot be added due to your queue being full. Removing another song will lead to a second error right now, but it ...
• 题意简述在前n个正整数中选取m个数ai，使得1/ai之和为X/Y分析HNOI的一道题 《彩票》 直接n选m的搜索，加上可行性剪枝(继续选总和一定小于或大于X/Y)似乎就可以过了 但是时间效率不太理想尝试了2个优化： ...
题意简述

在前n个正整数中选取m个数ai，使得1/ai之和为X/Y

分析

HNOI的一道题  《彩票》
直接n选m的搜索，加上可行性剪枝(继续选总和一定小于或大于X/Y)似乎就可以过了
但是时间效率不太理想

尝试了2个优化：
1预处理1/i  减少实数运算
2先dp一下前n个数选m个hash值为p是否可行
在搜索时发现当前hash值不可行就直接剪枝

这2个优化效果都比较显著
优化2更是将效率提升为原来的10倍

代码

#include<cstdio>
#include<cmath>
#define fo(i,a,b) for(int i=a;i<=b;i++)
int n,m,x,y,ans;
typedef double ld;
const int p=5003;
const long double eps=(ld)1e-10 ;//1e-9  (lf)
ld f,d[100],g[100];
int a[1000],ni[300],hf;
bool h[70][70][p+10];
double lfabs(ld a){
if (a<0)
return -a;
return a;
}
int pow(int a,int n){
int ans=1;
while (n){
if (n&1)
ans=ans*a%p;
a=a*a%p;
n>>=1;
}
return ans;
}
void dfs(int la,int now,ld s,int u){
if (u>=p)
u-=p;
if (!h[la+1][m-now][(hf-u+p)%p])
return;
if (now==m){
if (lfabs(s-f)<eps){//abs  fabs
ans++;
/*printf("%d:\n",ans);
fo(i,1,m)
printf("%d ",a[i]);
putchar('\n');*/
}
return;
}
/*if ((s+((ld)(m-now+1)/(la+1)))<f)
return;
if ((s+((ld)(m-now+1)/n))>f)
return;*/
if (s+g[la+m-now]-g[la]<f-eps)//la+m   eps
return;
if (s+g[n]-g[n-m+now]>f+eps)
return;
fo (i,la+1,n){//n-m+now
//a[now]=i;
dfs(i,now+1,s+d[i],u+ni[i]);
}
}
int main(){
scanf("%d%d%d%d",&m,&n,&x,&y);
fo(i,1,n)
ni[i]=pow(i,p-2);
//printf("%d\n",ni[5]);
h[n+1][0][0]=1;
for(int i=n;i>=1;i--){
h[i][0][0]=1;
fo(k,0,p-1){
int t=k-ni[i];
if (t<0)
t+=p;
fo(j,1,m){
h[i][j][k]=h[i+1][j][k]||h[i+1][j-1][t];
}
}
}
fo(i,1,n)
d[i]=(ld)1/i;
fo(i,1,n)
g[i]=g[i-1]+d[i];
f=(ld)x/y;hf=x*ni[y]%p;
dfs(0,0,0,0);
printf("%d\n",ans);
return 0;
}
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• <div><p><em>From <a href="https://code.google.com/u/117310112843043412265/">keirangtp</a> on December 25, 2010 13:40:29</em></p> <p>We're loading them - why can't we support the other way ...
• <div><p><em>From <a href="https://code.google.com/u/117310112843043412265/">keirangtp</a> on December 25, 2010 13:56:17</em></p> <p>We're loading them - why can't we support the other way ...
• Song : San Francisco (Be Sure to Wear Some Flowers in Your Hair) Singer: Scott McKenzie If you're going to San Francisco Be sure to wear
• (ZZ From ... Take me to your heartHidingfromtherainandsnow躲避在风雪之中TryingtoforgetbutIwon’tletgo尝试着忘记过去，可是我却无法做到Lookingatacrowdedstreet凝视着拥挤的街道Lis...
• - Play a song, and while playing said song put it somewhere in your queue (doesn't matter where). Quit QL. Now start QL again. While the "now playing" state is correct (barring the above ...
• Didn't I (Blow Your Mind This Time) 转载于:https://my.oschina.net/qiudaozhang/blog/3045113...
• <div><p><strong>Summary</strong></p> <p>By setting relative ... This will not modify the configuration file, so your setup remains portable.</p><p>该提问来源于开源项目：Vocaluxe/Vocaluxe</p></div>
• <p>Say you start your 20bar song at 120pbm and slow it down to 90bpm at bar 10 with a BPM marker. When rehearsing it you reach bar 12 and reposition at bar 8 - so somewhere_before_ the BPM 90 marker, ...
• <p>In general, this plugin would let you listen to a song/track at any time by interrupting the currently playing song. <p>Functions something like this.. <p>When activated, (middle mouse click?) a ...
• <p>If this song is inside your bms folder, then adding the bms folder will cause the entire song loading process to crash, and no songs are added. <p>Experiment 1: Add large bms folder, containing ...
• <div><p>Playing on SMO earlier today, I found that after changing your song options, you are automatically thrown back to your last played song if you navigate to another song before changing the song...
• <p>Thank you for all the work already done on your project. <p>I come to you because my librespot instalation works just for one song :( (RPI 3B+ RASPIAN BUSTER LITE, connected at one LG bluetooth...
• when i load json song by ajax and set on player last song does not stop and new song are set than 2 song are playing in one page ... is there any way to fixed this problem</p><p>该提问来源于开源项目&...
• I have noticed though that every dozen songs or so, after a song has been scobbled, it restarts from the beginning of the song again. I guess I'll have to bit the bullet and just test for a day ...
• <div><p>Hi Balbuze, Thanks for your plugin, i love it! Sadly when I play a song, spotify stops and the plugin too. I have to connect again to volumio and press play again. I can't play a whole ...
• <div><p>Optionally save and show the picture of a song related to the song instead of its album. Use this feature if your music collection contains more single songs than full albums. <p>Original ...
• like others to remix or <code>CC-BY-ND</code> if you do not like people editing your song. Choose a license here: https://creativecommons.org/choose/ Please do not choose NC as this might disable ...
• i downloaded and tried your spotify Addon. Using it through kodi works fine for me. But when i want to use spotify Connect: Opening spotify on my mobile, checking my kodi as play source and starting a...
• That's Why ( You Go away...Baby won't you tell me why there is sadness in your eyes I don't wanna say goodbye to you Love is one big illusion I should try to forgetbut there is something left in my he...
• <p>Thank you for all the work already done on your project. <p>I come to you because my raspotify instalation works (RPI 3B+ BUSTER connected to a LG bluetooth soundbar via bluealsa), but just for...
• t see how long it takes till your song requested is being played. So within the playlist it'd be nice to see how much time till song number x is going to be played. <p>Example: <pre><code> 0. ABBA...

...