模板

模板……有需要的人也可以拿走

1、高精度模板(v1.0)

注意：主要耗时在乘法、除法和乘方。其中高精度乘方有快速幂优化，常数大致是乘法的5~10倍。除法用二分写的效率较低，大概是乘法的20~30倍，能不用尽量不用

#define mx 300
struct gaojing{
     int len;
     int a[mx+10];
}zero,one;
inline void set0(gaojing &s)//高精清零
{
    s.len=1;
    for (int i=1;i<=mx+5;i++)s.a[i]=0;
}
inline void inputn(gaojing &a)//高精输入 
{
    set0(a);
    char ch=getchar();
    while (ch<'0'||ch>'9')ch=getchar();  
    while (ch>='0'&&ch<='9')  
    {  
        a.a[a.len++]=ch-'0';
        ch=getchar();
    }
    a.len--;  
    int change[mx+15];
    for (int i=1;i<=a.len;i++)  
      change[i]=a.a[i];  
    for (int i=1;i<=a.len;i++)  
      a.a[i]=change[a.len-i+1];
    while (a.a[a.len]==0)a.len--;
}  
inline void put(gaojing a)//高精输出
{
    for (int i=a.len;i>=1;i--)printf("%d",a.a[i]);
    printf("
");
}
inline bool operator < (const gaojing &a,const gaojing &b)//高精< 
{
    if (a.len<b.len)return 1;
    if (a.len>b.len)return 0;
    for (int i=a.len;i>=1;i--)
    {
        if (a.a[i]<b.a[i])return 1;
        if (a.a[i]>b.a[i])return 0;
    }
    return 0;
}
inline bool operator == (const gaojing &a,const gaojing &b)//高精==
{
    if (a.len!=b.len)return 0;
    for (int i=a.len;i>=1;i--)
    {
        if (a.a[i]!=b.a[i])return 0;
    }
    return 1;
}
inline gaojing max(const gaojing &a,const gaojing &b)//高精max
{
    if (a<b)return b;
    else return a;
}
inline gaojing min(const gaojing &a,const gaojing &b)//高精min
{
    if (a<b)return a;
    else return b;
} 
inline gaojing operator + (const gaojing &a,const gaojing &b)//高精+
{
    gaojing c;set0(c);  
    int maxlen=max(a.len,b.len);      
    for (int i=1;i<=maxlen;i++)      
    {      
        c.a[i]=c.a[i]+a.a[i]+b.a[i];      
        if (c.a[i]>=10)      
        {      
            c.a[i+1]+=c.a[i]/10;    
            c.a[i]%=10;    
        }    
    }      
    c.len=maxlen+4;      
    while (!c.a[c.len]&&c.len>1) c.len--;    
    return c;
}
inline gaojing operator - (const gaojing &a,const gaojing &b)//高精-
{
    gaojing c;set0(c);
    gaojing d;d=a;
    for (int i=1;i<=b.len;i++)  
      {  
        c.a[i]=d.a[i]-b.a[i];  
        if (c.a[i]<0)  
        {  
            c.a[i]+=10;  
            int now=i+1;  
            while (!d.a[now])  
            {  
                d.a[now]=9;  
                now++;  
            }  
            d.a[now]--;  
        }  
      }
    for (int i=b.len+1;i<=d.len;i++)c.a[i]=d.a[i];  
    c.len=d.len;  
    while (c.a[c.len]==0&&c.len>1)c.len--;
    return c;
}  
inline gaojing operator * (const gaojing &a,const gaojing &b)//高精*
{
    gaojing c;set0(c);
    for(int i=1;i<=a.len;i++)    
      for (int j=1;j<=b.len;j++)    
        c.a[i+j-1]+=a.a[i]*b.a[j];    
    c.len=a.len+b.len+5;  
    for (int i=1;i<=c.len;i++)    
      {    
        c.a[i+1]+=c.a[i]/10;    
        c.a[i]%=10;    
      }    
    while (!c.a[c.len]&&c.len>1)c.len--;
    return c;
}
inline void div_by_2(gaojing &a)
{
    for (int i=a.len;i>=1;i--)
    {
        if (a.a[i]&1 && i!=1)a.a[i-1]+=10;
        a.a[i]/=2;
    }
    while (!a.a[a.len]&&a.len>1)a.len--;
}
inline gaojing operator / (gaojing a,const gaojing &b)//高精/
{
    gaojing l,r,ans;
    set0(l);l.len=1;
    set0(r);r=a;
    set0(ans);ans.len=1;
    while (l<r||l==r)
    {
        gaojing mid=l+r;
        div_by_2(mid);
        if(mid*b==a)return mid;
        if(mid*b<a){ans=mid;l=mid+one;}
        if(a<mid*b)r=mid-one;
    }
    return ans;
}
inline gaojing operator ^(const gaojing &a,int p)//高精乘方
{
    gaojing ans=one,mult=a;
    while (p)
    {
        if (p&1)ans=ans*mult;
        mult=mult*mult;
        p>>=1;
    }
    return ans;
}
inline void chushihua()//初始化，对0、1高精度常数赋值
{
    set0(zero); zero.len=1;
    set0(one);one.len=1;one.a[1]=1;
}
int main()
{
    chushihua();
}

 2、打cf必备的一大串头文件(v2.1) ——连快速输出都有了还有什么好怕的

#include<cstdio>
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<cmath>
#include<queue>
#include<deque>
#include<set>
#include<map>
#include<ctime>
#define LL long long
#define inf 0x7ffffff
#define pa pair<int,int>
#define pi 3.1415926535897932384626433832795028841971
using namespace std;
inline LL read()
{
    LL x=0,f=1;char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
    return x*f;
}
inline void write(LL a)
{
    if (a<0){printf("-");a=-a;}
    if (a>=10)write(a/10);
    putchar(a%10+'0');
}
inline void writeln(LL a){write(a);printf("
");}
int main()
{
}

3、最短路模板(v1.0) spfa(+slf优化)和dijkstra(+stl堆优化)

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#define N 100010
#define M 200010
using namespace std;
int n,m,s,t,cnt;
struct edge{int to,next,v;}e[M];
long long dist[N];
bool mrk[N];
int q[N],head[N];
inline void insert(int u,int v,int w)
{
    e[++cnt].to=v;
    e[cnt].v=w;
    e[cnt].next=head[u];
    head[u]=cnt;
}
inline void spfa()
{
    for (int i=0;i<=n;i++)dist[i]=(long long)1<<40;
    q[1]=s;dist[s]=0;mrk[s]=1;
    int t=0,w=1;
    while (t!=w)
    {
        if (t==N-1)t=0;else t++;
        int now=q[t];
        for (int i=head[now];i;i=e[i].next)
            if (dist[e[i].to]>dist[now]+e[i].v)
            {
                dist[e[i].to]=dist[now]+e[i].v;
                if (!mrk[e[i].to])
                {
                    mrk[e[i].to]=1;
                    if (dist[e[i].to]<=dist[now])
                    {
                        q[t]=e[i].to;
                        if(t==0)t=N-1;else t--;
                        continue;
                    }
                    if (w==N-1)w=0;else w++;
                    q[w]=e[i].to;
                }
            }
        mrk[now]=0;
    }
}
int main()
{
    scanf("%d%d%d%d",&n,&m,&s,&t);
    for(int i=1;i<=m;i++)
    {
        int x,y,z;
        scanf("%d%d%d",&x,&y,&z);
        insert(x,y,z);
    }
    spfa();
    printf("%lld
",dist[t]);
}

……恩先这样吧还有的再加