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  • 水题——415A. Mashmokh and Lights

    A. Mashmokh and Lights
    time limit per test
    1 second
    memory limit per test
    256 megabytes
    input
    standard input
    output
    standard output

    Mashmokh works in a factory. At the end of each day he must turn off all of the lights.

    The lights on the factory are indexed from 1 to n. There are n buttons in Mashmokh's room indexed from 1 to n as well. If Mashmokh pushes button with index i, then each light with index not less than i that is still turned on turns off.

    Mashmokh is not very clever. So instead of pushing the first button he pushes some of the buttons randomly each night. He pushed m distinct buttonsb1, b2, ..., bm (the buttons were pushed consecutively in the given order) this night. Now he wants to know for each light the index of the button that turned this light off. Please note that the index of button bi is actually bi, not i.

    Please, help Mashmokh, print these indices.

    Input

    The first line of the input contains two space-separated integers n and m (1 ≤ n, m ≤ 100), the number of the factory lights and the pushed buttons respectively. The next line contains m distinct space-separated integers b1, b2, ..., bm (1 ≤ bi ≤ n).

    It is guaranteed that all lights will be turned off after pushing all buttons.

    Output

    Output n space-separated integers where the i-th number is index of the button that turns the i-th light off.

    Examples
    input
    5 4
    4 3 1 2
    output
    1 1 3 4 4 
    input
    5 5
    5 4 3 2 1
    output
    1 2 3 4 5 
    Note

    In the first sample, after pressing button number 4, lights 4 and 5 are turned off and lights 1, 2 and 3 are still on. Then after pressing button number 3, light number 3 is turned off as well. Pressing button number 1 turns off lights number 1 and 2 as well so pressing button number 2 in the end has no effect. Thus button number 4 turned lights 4 and 5 off, button number 3 turned light 3 off and button number 1 turned light 1 and 2 off.

    题意:有n盏灯和开关1,,2,3...第n个开关可以把第n个灯及其后面的灯关闭,操作了m次,每次按下一个开关,保证所有的灯最后都被关闭了,要求输出每个灯是被哪个开关关闭的。

     1 /*A*/
     2 #include<cstdio>
     3 #include<cstring>
     4 using namespace std;
     5 
     6 int main()
     7 {
     8     int n,m;
     9     int a[100+10];
    10     int ans[100+10];
    11     int vis[100+10];
    12     while(scanf("%d%d",&n,&m)!=EOF)
    13     {
    14         for(int i=0;i<m;i++)
    15             scanf("%d",&a[i]);
    16         memset(ans,0,sizeof(ans));
    17         memset(vis,0,sizeof(vis));
    18         for(int i=0;i<m;i++)
    19         {
    20             if(vis[a[i]]==0)
    21             {
    22                 for(int j=a[i];j<=n;j++)
    23                 {
    24                     if(vis[ans[j]]==0)
    25                     {
    26                         ans[j]=a[i];
    27                         vis[j]=1;
    28                     }
    29                 }
    30             }
    31         }
    32         printf("%d ",ans[1]);
    33         for(int i=2;i<=n;i++)
    34             printf("%d ",ans[i]);
    35         printf("
    ");
    36     }
    37     return 0;
    38 }
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  • 原文地址:https://www.cnblogs.com/yepiaoling/p/5313245.html
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