• 高精度模板


    namespace LONGER{
        typedef long long ll;
        typedef unsigned long long UTYPE;
        typedef ll TYPE;
        const TYPE sll=sizeof(TYPE);
        const TYPE MAXLENGTH=50;
        inline TYPE max(const TYPE&a,const TYPE&b){return a<b?b:a;}
        inline void Swap(long long &a,long long &b){a=a^b;b=a^b;a=a^b;}
        struct Longer{
        #define LOWBIT 1000000000
            int size;
            TYPE num[MAXLENGTH];
            Longer(const TYPE&a=0){size=1;memset(num,0,sizeof(num));num[1]=a;}
            TYPE &operator[](int x){return num[x];}
        };
        Longer operator +(const Longer&,const Longer&);
        Longer operator -(const Longer&,const Longer&);
        Longer operator *(const Longer&,const Longer&);
        Longer operator /(const Longer&,const Longer&);
        Longer operator /(const Longer&,const TYPE&);
        Longer operator % (const Longer&,const Longer&);
        Longer operator <<(const Longer&,const TYPE&);
        Longer operator >>(const Longer&,const TYPE&);
        bool   operator <(const Longer&,const Longer&);
        bool   operator >(const Longer&,const Longer&);
        bool   operator >=(const Longer&,const Longer&);
        bool   operator <=(const Longer&,const Longer&);
        bool   operator !=(const Longer&,const Longer&);
        bool   operator ==(const Longer&,const Longer&);
        void read(Longer &);
        void fread(Longer &,FILE*);
        void put(const Longer&);
        void fput(const Longer&,FILE*);
        Longer exchange(const Longer&);
        Longer exchange(const Longer&a){
            Longer c;
            c.size=a.size;
            for(int i=1;i<=a.size;++i)
                c.num[i]=a.num[a.size-i+1];
            return c;
        }
        Longer operator <<(const Longer&a,const TYPE&b){
            Longer c;
            c.size=a.size+b;
            for(int i=1;i<=a.size;++i)
                if( i+b <MAXLENGTH )c.num[i+b]=a.num[i];
            return c;
        }
        Longer operator >>(const Longer&a,const TYPE&b){
            Longer c;
            c.size=max(1,a.size-b);
            for(int i=b+1;i<=a.size;++i)
                c.num[i-b]=a.num[i];
            return c;
        }
        Longer operator +(const Longer &a,const Longer &b){
            Longer c;
            c.size=max(a.size,b.size);
            for(int i=1;i<=c.size;++i)
                c.num[i]=a.num[i]+b.num[i];
            for(int i=1;i<=c.size;++i){
                c.num[i+1]+=c.num[i]/LOWBIT;
                c.num[i]%=LOWBIT;
            }
            while(c.num[c.size+1]!=0)c.size++;
            return c;
        }
        Longer operator -(const Longer &a,const Longer &b){
            if(a<b)return 0;
            Longer c;
            c.size=max(a.size,b.size);
            for(int i=1;i<=c.size;++i)
                c.num[i]=a.num[i]-b.num[i];
            for(int i=1;i<=c.size;++i)
                if(c.num[i]<0){
                    c.num[i]+=LOWBIT;
                    --c.num[i+1];
                }
            while(c.num[c.size]==0&&c.size>0)--c.size;
            return c;
        }
        Longer operator *(const Longer &a,const Longer &b){
            Longer c;
            c.size=a.size+b.size-1;
            for(int i=1;i<=a.size;++i)
                for(int j=1;j<=b.size;++j)
                    c.num[i+j-1]+=a.num[i]*b.num[j];
            for(int i=1;i<=c.size;++i){
                c.num[i+1]+=c.num[i]/LOWBIT;
                c.num[i]%=LOWBIT;
            }
            if(c.num[c.size+1]!=0)c.size++;
            return c;
        }
        Longer operator / (const Longer&a,const TYPE&b){
            if(b==1)return a;
            TYPE d=0;
            Longer c;
            c.size=a.size;
            for(int i=c.size;i>=1;--i){
                c.num[i]=(d*LOWBIT+a.num[i])/b;
                d=(d*LOWBIT+a.num[i])%b;
            }
            while(c.num[c.size]==0&&c.size>0)--c.size;
            return c;
        }
        Longer operator / (const Longer &_a,const Longer &_b){
            if(_b==1)return _a;
            Longer l=1,r=1,mid,p,a=_a,b=_b;
            if(b==0){printf("Runtime Error in Big Integer :: the devided number cannot be zero.
    ");abort();}
            if(a==0||a<b)return 0;
            TYPE k=max(a.size-b.size,0);
            l=l<<(k-1);
            r=r<<(k+1);
            //put(l);put(r);
            while(l<r){
                mid=((l+r)/2);
                p=mid*b;
                if(p==a)return mid;
                else if(p>a)r=mid+(-1);
                     else l=mid+1;
            }
            if(l*b>a)return l-1;
            return l;
        }
        Longer operator %(const Longer &_a,const Longer&_b){
            return _a-(_a/_b)*_b;
        }
        bool operator <(const Longer&a,const Longer&b){
            if(a.size!=b.size)return a.size<b.size;
            for(int i=a.size;i>=1;--i)
                if(a.num[i]!=b.num[i])
                return a.num[i]<b.num[i];
            return 0;
        }
        bool operator >(const Longer&a,const Longer&b){return b<a;}
        bool operator >=(const Longer&a,const Longer&b){return a>b||a==b;}
        bool operator <=(const Longer&a,const Longer&b){return a<b||a==b;}
        bool operator !=(const Longer&a,const Longer&b){return !(a==b);}
        bool operator ==(const Longer &a,const Longer&b){return !(a<b)&&!(b<a);}
        void read(Longer &t){t=0;
            std::string s;
            char str[1024];
            scanf("%s",str);
            s=str;
            int sizen=s.length();
        //  printf("
    
    sizen->%d
    
    ",sizen);
            int p=sizen%9,i=0;TYPE k=0;
            t.size=sizen/9+(sizen%9!=0);
            if(p!=0){for(i=0;i<p;++i)k=k*10+s[i]-'0'; t.num[t.size--]=k; k=0;}
            while(t.size){
                p=i+9;
                for(;i<p;++i)k=k*10+s[i]-'0';
                t.num[t.size--]=k;k=0;
            }t.size=sizen/9+(sizen%9!=0);
            t=t+0;
        }
        void put(const Longer &k){
            printf("%lld",k.num[k.size]);
            for(int i=k.size-1;i>=1;--i)
                printf("%.9lld",k.num[i]);
        }
        void fread(Longer &t,FILE*IR){t=0;
            std::string s;
            char str[1024];
            fscanf(IR,"%s",str);
            s=str;
            int sizen=s.length();
            int p=sizen%9,i=0;TYPE k=0;
            t.size=sizen/9+(sizen%9!=0);
            if(p!=0){for(i=0;i<p;++i)k=k*10+s[i]-'0'; t.num[t.size--]=k; k=0;}
            while(t.size){
                p=i+9;
                for(;i<p;++i)k=k*10+s[i]-'0';
                t.num[t.size--]=k;k=0;
            }t.size=sizen/9+(sizen%9!=0);
            t=t+0;
        }
        void fput(const Longer &k,FILE*OR){
            fprintf(OR,"%lld",k.num[k.size]);
            for(int i=k.size-1;i>=1;--i)
                fprintf(OR,"%09lld",k.num[i]);
        }
    }
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  • 原文地址:https://www.cnblogs.com/upstart/p/6555287.html
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