一些工具

配置

vscode

运行

g++ -o a a.cpp && ./a

越界检测加设置 c++14 加 O2 加警告加显示运行时间

g++ -O2 -std=c++14 -Wall -fsanitize=address,undefined -o a a.cpp && time ./a

设置

{
    "workbench.colorTheme": "Solarized Light",
    "files.autoSave": "afterDelay",
    "editor.cursorSmoothCaretAnimation": "on",
    "workbench.list.smoothScrolling": true,
    "editor.smoothScrolling": true,
    "terminal.integrated.smoothScrolling": true,
    "workbench.iconTheme": "vscode-icons",
    "editor.minimap.enabled": false,
    "editor.cursorBlinking": "smooth",
    "terminal.integrated.enableMultiLinePasteWarning": false,
    "explorer.confirmDelete": false
}

freopen

#ifndef ONLINE_JUDGE
freopen("rand.out","r",stdin);
freopen("a.out","w",stdout);
#endif

读写优化

快读快写 1.0 版本

template<typename Tp> inline void read(Tp&x)
{
	x=0;register bool z=true;
	register char c=getchar_unlocked();
	for(;!isdigit(c);c=getchar_unlocked()) if(c=='-') z=0;
	for(;isdigit(c);c=getchar_unlocked()) x=(x<<1)+(x<<3)+(c^48);
	x=(z?x:~x+1);
}
template<typename T,typename ...Tp> inline void read(T &x,Tp &...y){read(x);read(y...);}
template<typename Tp> inline void wt(Tp x){if(x>9)wt(x/10);putchar_unlocked((x%10)+'0');}
template<typename Tp> inline void write(Tp x){if(x<0)putchar_unlocked('-'),x=~x+1;wt(x);}
template<typename T,typename ...Tp> inline void write(T x,Tp ...y){write(x);putchar_unlocked(' ');write(y...);}

快读快写 2.5 版本

#ifdef __linux__
#define gc getchar_unlocked
#define pc putchar_unlocked
#else
#define gc _getchar_nolock
#define pc _putchar_nolock
#endif
inline bool blank(const char x) {return !(x^32)||!(x^10)||!(x^13)||!(x^9);}
template<typename Tp> inline void read(Tp &x) {x=0; register bool z=true; register char a=gc(); for(;!isdigit(a);a=gc()) if(a=='-') z=false; for(;isdigit(a);a=gc()) x=(x<<1)+(x<<3)+(a^48); x=(z?x:~x+1);}
inline void read(double &x) {x=0.0; register bool z=true; register double y=0.1; register char a=gc(); for(;!isdigit(a);a=gc()) if(a=='-') z=false; for(;isdigit(a);a=gc()) x=x*10+(a^48); if(a!='.') return x=z?x:-x,void(); for(a=gc();isdigit(a);a=gc(),y/=10) x+=y*(a^48); x=(z?x:-x);}
inline void read(char &x) {for(x=gc();blank(x)&&(x^-1);x=gc());}
inline void read(char *x) {register char a=gc(); for(;blank(a)&&(a^-1);a=gc()); for(;!blank(a)&&(a^-1);a=gc()) *x++=a; *x=0;}
inline void read(string &x) {x=""; register char a=gc(); for(;blank(a)&&(a^-1);a=gc()); for(;!blank(a)&&(a^-1);a=gc()) x+=a;}
template<typename T,typename ...Tp> inline void read(T &x,Tp &...y) {read(x),read(y...);}
template<typename Tp> inline void write(Tp x) {if(!x) return pc(48),void(); if(x<0) pc('-'),x=~x+1; register int len=0; register char tmp[64]; for(;x;x/=10) tmp[++len]=x%10+48; while(len) pc(tmp[len--]);}
inline void write(const double x) {register int a=6; register double b=x,c=b; if(b<0) pc('-'),b=-b,c=-c; register double y=5*powl(10,-a-1); b+=y,c+=y; register int len=0; register char tmp[64]; if(b<1) pc(48); else for(;b>=1;b/=10) tmp[++len]=floor(b)-floor(b/10)*10+48; while(len) pc(tmp[len--]); pc('.'); for(c*=10;a;a--,c*=10) pc(floor(c)-floor(c/10)*10+48);}
inline void write(const pair<int,double>x) {register int a=x.first; if(a<7) {register double b=x.second,c=b; if(b<0) pc('-'),b=-b,c=-c; register double y=5*powl(10,-a-1); b+=y,c+=y; register int len=0; register char tmp[64]; if(b<1) pc(48); else for(;b>=1;b/=10) tmp[++len]=floor(b)-floor(b/10)*10+48; while(len) pc(tmp[len--]); a&&(pc('.')); for(c*=10;a;a--,c*=10) pc(floor(c)-floor(c/10)*10+48);} else cout<<fixed<<setprecision(a)<<x.second;}
inline void write(const char x) {pc(x);}
inline void write(const bool x) {pc(x?49:48);}
inline void write(char *x) {fputs(x,stdout);}
inline void write(const char *x) {fputs(x,stdout);}
inline void write(const string &x) {fputs(x.c_str(),stdout);}
template<typename T,typename ...Tp> inline void write(T x,Tp ...y) {write(x),write(y...);}

解绑cin、cout

ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);

模板

  • 在 文件 中均有涉及。

1.0 版本

#include<bits/stdc++.h>
#define ll long long 
#define endl '\n'
#define sort stable_sort
using namespace std;
const int N=1e5+10;
template<typename Tp> inline void read(Tp&x)
{
	x=0;register bool z=true;
	register char c=getchar_unlocked();
	for(;!isdigit(c);c=getchar_unlocked()) if(c=='-') z=0;
	for(;isdigit(c);c=getchar_unlocked()) x=(x<<1)+(x<<3)+(c^48);
	x=(z?x:~x+1);
}
template<typename T,typename ...Tp> inline void read(T &x,Tp &...y){read(x);read(y...);}
template<typename Tp> inline void wt(Tp x){if(x>9)wt(x/10);putchar_unlocked((x%10)+'0');}
template<typename Tp> inline void write(Tp x){if(x<0)putchar_unlocked('-'),x=~x+1;wt(x);}
template<typename T,typename ...Tp> inline void write(T x,Tp ...y){write(x);putchar_unlocked(' ');write(y...);}

signed main()
{
	
}

2.5 版本

  • 相较于 1.0 版本增加了 2.5 版本的快读快写，去掉了 #define endl '\n' 和 #define sort stable_sort，增加了 #define mkp make_pair。
#include<bits/stdc++.h>
#define ll long long
#define mkp make_pair
using namespace std;
const int N=1e5+10;
#ifdef __linux__
#define gc getchar_unlocked
#define pc putchar_unlocked
#else
#define gc _getchar_nolock
#define pc _putchar_nolock
#endif
inline bool blank(const char x) {return !(x^32)||!(x^10)||!(x^13)||!(x^9);}
template<typename Tp> inline void read(Tp &x) {x=0; register bool z=true; register char a=gc(); for(;!isdigit(a);a=gc()) if(a=='-') z=false; for(;isdigit(a);a=gc()) x=(x<<1)+(x<<3)+(a^48); x=(z?x:~x+1);}
inline void read(double &x) {x=0.0; register bool z=true; register double y=0.1; register char a=gc(); for(;!isdigit(a);a=gc()) if(a=='-') z=false; for(;isdigit(a);a=gc()) x=x*10+(a^48); if(a!='.') return x=z?x:-x,void(); for(a=gc();isdigit(a);a=gc(),y/=10) x+=y*(a^48); x=(z?x:-x);}
inline void read(char &x) {for(x=gc();blank(x)&&(x^-1);x=gc());}
inline void read(char *x) {register char a=gc(); for(;blank(a)&&(a^-1);a=gc()); for(;!blank(a)&&(a^-1);a=gc()) *x++=a; *x=0;}
inline void read(string &x) {x=""; register char a=gc(); for(;blank(a)&&(a^-1);a=gc()); for(;!blank(a)&&(a^-1);a=gc()) x+=a;}
template<typename T,typename ...Tp> inline void read(T &x,Tp &...y) {read(x),read(y...);}
template<typename Tp> inline void write(Tp x) {if(!x) return pc(48),void(); if(x<0) pc('-'),x=~x+1; register int len=0; register char tmp[64]; for(;x;x/=10) tmp[++len]=x%10+48; while(len) pc(tmp[len--]);}
inline void write(const double x) {register int a=6; register double b=x,c=b; if(b<0) pc('-'),b=-b,c=-c; register double y=5*powl(10,-a-1); b+=y,c+=y; register int len=0; register char tmp[64]; if(b<1) pc(48); else for(;b>=1;b/=10) tmp[++len]=floor(b)-floor(b/10)*10+48; while(len) pc(tmp[len--]); pc('.'); for(c*=10;a;a--,c*=10) pc(floor(c)-floor(c/10)*10+48);}
inline void write(const pair<int,double>x) {register int a=x.first; if(a<7) {register double b=x.second,c=b; if(b<0) pc('-'),b=-b,c=-c; register double y=5*powl(10,-a-1); b+=y,c+=y; register int len=0; register char tmp[64]; if(b<1) pc(48); else for(;b>=1;b/=10) tmp[++len]=floor(b)-floor(b/10)*10+48; while(len) pc(tmp[len--]); a&&(pc('.')); for(c*=10;a;a--,c*=10) pc(floor(c)-floor(c/10)*10+48);} else cout<<fixed<<setprecision(a)<<x.second;}
inline void write(const char x) {pc(x);}
inline void write(const bool x) {pc(x?49:48);}
inline void write(char *x) {fputs(x,stdout);}
inline void write(const char *x) {fputs(x,stdout);}
inline void write(const string &x) {fputs(x.c_str(),stdout);}
template<typename T,typename ...Tp> inline void write(T x,Tp ...y) {write(x),write(y...);}

signed main()
{
	
}

计算数组空间大小

void array_space() {cerr<<(sizeof(a))/1024./1024<<endl;}

对拍

  • 因为在 文件 中均有涉及，所以只放了没有缺省源的版本，若需要更高一点的效率请下载 文件。

a.cpp

#include<bits/stdc++.h>
using namespace std;
signed main()
{
    freopen("rand.out","r",stdin);
    freopen("a.out","w",stdout);
}

std.cpp

#include<bits/stdc++.h>
using namespace std;
signed main()
{
    freopen("rand.out","r",stdin);
    freopen("std.out","w",stdout);
}

rand.cpp

#include<bits/stdc++.h>
using namespace std;
signed main()
{
    freopen("/dev/urandom","r",stdin);
    freopen("rand.out","w",stdout);
    srand(getchar()*getchar()*getchar()*time(0));
    int n=rand()%100+1;
    printf("%d\n",n);
    while(n--)
    {
        int a=rand()%100+1;
        printf("%d ",a);
    }
}

dp.cpp

#include<bits/stdc++.h>
using namespace std;
signed main()
{
    int T=10000,tot=0;
    while(T--)
    {
        printf("%d ",++tot);
        system("./rand; ./a; ./std");
        if(system("diff a.out std.out -Z")) return puts("WA"),0;
        puts("AC");
    }
}

linux 系统防死机

  • 转载自 jijidawang。
watch -n 1 "/usr/bin/free | awk 'NR > 1{ if (\$3 / \$2 > 0.35) system(\"killall5\") }'"

有用的网站

各大常用网站账号

剩下的可能不太常用，账号通常是 Charlie_ 或 Charlie_ljk。

posted @ 2024-07-11 15:17  卡布叻_周深  阅读(238)  评论(5)    收藏  举报