fastIO

不考虑内存浪费的fastIO

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 namespace IO
 4 {
 5     const int len=1<<25;
 6     bool flag;
 7     char ch,ibuf[len],wbuf[len];
 8     int il=0,wl=0,g,G[55];
 9     void in(){int x=fread(ibuf,1,len,stdin);}
10     inline void out(){int x=fwrite(wbuf,1,wl,stdout);}
11     inline void gc(char&c){c=ibuf[il++];}
12     template<typename T>void read(T&x)
13     {
14         flag=0;gc(ch);
15         if(ch=='-')flag=1;
16         while(!isdigit(ch)){if(ch=='-')flag=1;gc(ch);}
17         x=ch-'0';gc(ch);
18         while(isdigit(ch)){x=x*10+ch-'0';gc(ch);}
19         x=flag?-x:x;
20     }
21     template<typename T>void write(T x)
22     {
23         if(x<0)wbuf[wl++]='-',x=-x;
24         g=0;
25         do{G[++g]=x%10;x/=10;}while(x);
26         for(int i=g;i>=1;--i)wbuf[wl++]='0'+G[i];
27         wbuf[wl++]='\n';
28     }
29 }
30 int main()
31 {
32     ios::sync_with_stdio(false);
33     IO::in();
34     IO::out();
35     return 0;
36 }
View Code

若总共需要读入和输出len个字符，需占用len/1048576*2 Mb的内存。

 

自动清空的fastIO

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 typedef long long int ll;
 4 namespace IO
 5 {
 6     const int len=1<<10;
 7     bool flag;
 8     char ch,ibuf[len],wbuf[len];
 9     int il=len,wl=0,g,G[55];
10     inline void in()
11     {
12         int x=fread(ibuf,1,len,stdin);
13         il=0;
14     }
15     inline void out()
16     {
17         int x=fwrite(wbuf,1,wl,stdout);
18         wl=0;
19     }
20     inline void gc(char&c)
21     {
22         if(il==len)
23             in();
24         c=ibuf[il++];
25     }
26     inline void wc(char c)
27     {
28         if(wl==len)
29             out();
30         wbuf[wl++]=c;
31     }
32     template<typename T>void read(T&x)
33     {
34         flag=0;gc(ch);
35         if(ch=='-')flag=1;
36         while(!isdigit(ch)){if(ch=='-')flag=1;gc(ch);}
37         x=ch-'0';gc(ch);
38         while(isdigit(ch)){x=x*10+ch-'0';gc(ch);}
39         x=flag?-x:x;
40     }
41     template<typename T>void write(T x)
42     {
43         if(x<0)wc('-'),x=-x;
44         g=0;
45         do{G[++g]=x%10;x/=10;}while(x);
46         for(int i=g;i>=1;--i)wc(G[i]+'0');
47         wc('\n');
48     }
49 }
50 int main()
51 {
52     freopen("a.in","r",stdin);
53     freopen("a.out","w",stdout);
54     ios::sync_with_stdio(false);
55     int n;
56     IO::read(n);
57     ll sum=0;
58     for(int i=1;i<=n;++i)
59     {
60         int x;
61         IO::read(x);
62         sum+=x;
63         IO::write(sum);
64     }
65     IO::out();
66     return 0;
67 }
View Code

 

 posted on 2020-06-26 08:20  GreenDuck  阅读(209)  评论(0)  编辑  收藏  举报