企业网站实施方案,跨境电商营销策划方案,加强公司网站平台建设的意义,如何制作表白小程序题目#xff1a;白书p274
题意: KTV里面有n首歌曲你可以选择,每首歌曲的时长都给出了. 对于每首歌曲,你最多只能唱1遍. 现在给你一个时间限制t (t10^9) , 问你在最多t-1秒的时间内可以唱多少首歌曲num , 且最长唱歌时间是多少time (time必须t-1) ? 最终输出num1 和…题目白书p274
题意: KTV里面有n首歌曲你可以选择,每首歌曲的时长都给出了. 对于每首歌曲,你最多只能唱1遍. 现在给你一个时间限制t (t10^9) , 问你在最多t-1秒的时间内可以唱多少首歌曲num , 且最长唱歌时间是多少time (time必须t-1) ? 最终输出num1 和 time678 即可. 注意: 你需要优先让歌曲数目最大的情况下,再去选择总时长最长的. 解析: 每种歌曲只能用一次,所以是比较水的01背包题 最后枚举找到最大曲目数量并且时间尽量靠后即可
题目中t的范围是1e9但实际的t不会超过10000这就可以转化为01背包问题
(If you smiled when you see the title, this problem is for you ^_^)
For those who don’t know KTV, see: http://en.wikipedia.org/wiki/Karaoke_box
There is one very popular song called Jin Ge Jin Qu(). It is a mix of 37 songs, and is extremely long (11 minutes and 18 seconds) — I know that there are Jin Ge Jin Qu II and III, and some other unofficial versions. But in this problem please forget about them.
Why is it popular? Suppose you have only 15 seconds left (until your time is up), then you should select another song as soon as possible, because the KTV will not crudely stop a song before it ends (people will get frustrated if it does so!). If you select a 2-minute song, you actually get 105 extra seconds! ....and if you select Jin Ge Jin Qu, you’ll get 663 extra seconds!!!
Now that you still have some time, but you’d like to make a plan now. You should stick to the following rules:
• Don’t sing a song more than once (including Jin Ge Jin Qu).
• For each song of length t, either sing it for exactly t seconds, or don’t sing it at all.
• When a song is finished, always immediately start a new song.
Your goal is simple: sing as many songs as possible, and leave KTV as late as possible (since we have rule 3, this also maximizes the total lengths of all songs we sing) when there are ties.
Input
The first line contains the number of test cases T (T ≤ 100). Each test case begins with two positive integers n, t (1 ≤ n ≤ 50, 1 ≤ t ≤ 109 ), the number of candidate songs (BESIDES Jin Ge Jin Qu) and the time left (in seconds). The next line contains n positive integers, the lengths of each song, in seconds. Each length will be less than 3 minutes — I know that most songs are longer than 3 minutes. But don’t forget that we could manually “cut” the song after we feel satisfied, before the song ends. So here “length” actually means “length of the part that we want to sing”.
It is guaranteed that the sum of lengths of all songs (including Jin Ge Jin Qu) will be strictly larger than t.
Output
For each test case, print the maximum number of songs (including Jin Ge Jin Qu), and the total lengths of songs that you’ll sing.
Explanation:
In the first example, the best we can do is to sing the third song (80 seconds), then Jin Ge Jin Qu for another 678 seconds.
In the second example, we sing the first two (306999 seconds). Then we still have one second left, so we can sing Jin Ge Jin Qu for extra 678 seconds. However, if we sing the first and third song instead (3070100 seconds), the time is already up (since we only have 100 seconds in total), so we can’t sing Jin Ge Jin Qu anymore!
Sample Input
2
3 100
60 70 80
3 100
30 69 70
Sample Output
Case 1: 2 758
Case 2: 3 777
#includestdio.h
#includestring.h
#includemap
#includealgorithm
using namespace std;
int t,m,n;
int dp[110];
int w[10000010];
int main()
{int k1;scanf(%d,t);while(t--){scanf(%d%d,m,n);for(int i0; im; i)scanf(%d,dp[i]);memset(w,-1,sizeof(w));w[0]0;/**care*/for(int i0; im; i)for(int jn-1; jdp[i]; j--)w[j]max(w[j],w[j-dp[i]]1);int ans0,sum;for(int i0;in;i){if(answ[i]){answ[i];sumi;}}printf(Case %d: %d %d\n,k,ans1,sum678);}return 0;
}
