• 做题记录--day30


    《算法笔记》3.1小节——入门模拟->简单模拟

    C简单,但是代码有点冗余,优化后省掉一般代码,保持优化习惯

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int a,b;
        while(scanf("%d%d",&a,&b)!=EOF)
        {
            int a1=a;
            int b1=b;
            int ans=0;
            while(a1/10 || a1%10)
            {
                int temp=a1%10;
                a1=a1/10;
                b1=b;
                while(b1/10)
                {
                    int temp2=b1%10;
                    b1=b1/10;
                    ans=ans+temp*temp2;
                }
                ans=ans+b1*temp;
            }
            printf("%d
    ",ans);
        }
        return 0;
    }
    View Code

     D无难点

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int n;
        int ji,ou;
    
        int temp;
        //int a[1005];
        while(scanf("%d",&n)!=EOF)
        {
                ji=0;
        ou=0;
            while(n--)
        {
            scanf("%d",&temp);
            if(temp%2)
                ji++;
            else
                ou++;
        }
        if(ou>ji) printf("NO
    ");
        else printf("YES
    ");
        }
        return 0;
    }
    View Code

     E无难点

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int n,m,left,right,ans;
        int len[100005];
        scanf("%d",&n);
        ans=0;
        for(int i=1;i<=n;i++)
        {
            scanf("%d",&len[i]);
            ans+=len[i];
        }
        scanf("%d",&m);
        while(m--)
        {
            scanf("%d%d",&left,&right);
            int ans1=0,ans2=0;
            for(int i=min(left,right);i<=max(left,right)-1;i++)
            {
                ans1+=len[i];
            }
            ans2=ans-ans1;
            printf("%d
    ",min(ans1,ans2));
        }
        return 0;
    }
    View Code

     F刚开始数据开小了,注意两个int相加是爆int的,不要解决那么点空间

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int n;
        long long a,b,c;
        scanf("%d",&n);
        for(int i=1;i<=n;i++)
        {
            scanf("%lld%lld%lld",&a,&b,&c);
            if(a+b>c) printf("Case #%d: true
    ",i);
            else printf("Case #%d: false
    ",i);
        }
        return 0;
    }
    View Code

     G题判断加标记开始写错位置啦,认真读题,还有,一位小数是%.1f不是%.f,注意

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int n;
        int temp;
        int numa4;
        bool a2pd;
        int a[6];
        bool pd[6];
        double ans4;
        while(scanf("%d",&n)!=EOF)
        {
            numa4=0;
            memset(a,0,sizeof(a));
            a2pd=false;
            memset(pd,0,sizeof(pd));
            while(n--)
            {
                scanf("%d",&temp);
                if(temp%5==0)
                {
                    if(temp%2==0)
                       {
                           a[1]+=temp;
                           pd[1]=true;
                       }
                }
                else if(temp%5==1)
                {
                    pd[2]=true;
                    if(!a2pd)
                        a[2]+=temp;
                    else
                        a[2]-=temp;
                    a2pd=!a2pd;
                }
                else if(temp%5==2)
                {
                    pd[3]=true;
                    a[3]++;
                }
                else if(temp%5==3)
                {
                    pd[4]=true;
                    a[4]+=temp;
                    numa4++;
                }
                else
                {
                    pd[5]=true;
                    if(temp>a[5]) a[5]=temp;
                }
            }
                       ans4=a[4]*1.0/numa4;
               // printf("%.1f",a[4]*1.0/numa4);
                for(int i=1;i<=5;i++)
                {
                    if(pd[i]==false) printf("N ");
                    else
                        if(i!=4)printf("%d ",a[i]);
                        else printf("%.1f ",ans4);
                }printf("
    ");
        }
        return 0;
    }
    View Code

     H无难点

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int a,b,da,db;
        int ansa,ansb;
        while(scanf("%d%d%d%d",&a,&da,&b,&db)!=EOF)
        {
            ansa=0;
            ansb=0;
            while(a)
            {
                if(a%10==da)
                {
                    ansa=ansa*10;
                    ansa+=da;
                }
                a=a/10;
            }
            while(b)
            {
                if(b%10==db)
                {
                    ansb=ansb*10;
                    ansb+=db;
                }
                b=b/10;
            }
            printf("%d
    ",ansa+ansb);
        }
        return 0;
    }
    View Code

     I是最有收获的一道题,if(a)在a不等于0的时候全部为真!!不仅仅是在大于!!!还有后面手误改了好久~题本身不难的啦;

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int ans1[5];
    int ans2[5];
    int jishu1[30];
    int jishu2[30];
    int pd(char a1,char a2)//1大0平-1负
    {
        if(a1=='C')
        {
            if(a2=='C') return 0;
            if(a2=='J') return 1;
            return -1;
        }
        if(a1=='J')
        {
            if(a2=='C') return -1;
            if(a2=='J') return 0;
            return 1;
        }
        if(a2=='C') return 1;
        if(a2=='J') return -1;
        return 0;
    }
    int main()
    {
        int n;
        scanf("%d",&n);
        while(n--)
        {
            char c1,c2;
            getchar();
            scanf("%c",&c1);
            getchar();
            scanf("%c",&c2);
            //printf("%d
    ",pd(c1,c2));
            if(pd(c1,c2)>0) jishu1[c1-65]++;
            else if(pd(c1,c2)<0) jishu2[c2-65]++;
            //printf("%d %d %d
    ",jishu2['C'-65],jishu2['J'-65],jishu2['B'-65]);
            ans1[pd(c1,c2)+1]++;
            ans2[pd(c2,c1)+1]++;
        }
        printf("%d %d %d
    ",ans1[2],ans1[1],ans1[0]);
        printf("%d %d %d
    ",ans2[2],ans2[1],ans2[0]);
        char maxchar1='C';char maxchar2='C';
        if(jishu1['B'-65]>=jishu1[maxchar1-65])
            maxchar1='B';
        if(jishu1['J'-65]>jishu1[maxchar1-65])
            maxchar1='J';
        if(jishu2['B'-65]>=jishu2[maxchar1-65])
            maxchar2='B';
        if(jishu2['J'-65]>jishu2[maxchar1-65])
            maxchar2='J';
        printf("%c %c
    ",maxchar1,maxchar2);
        return 0;
    }
    View Code

    《算法笔记》3.2小节——入门模拟->查找元素

    A无难点

    #include<stdio.h>
    #include<string.h>
    #include<algorithm>
    using namespace std;
    int main()
    {
        int n;
        int a[10000];
        int ans,score;
        while(scanf("%d",&n) && n!=0)
        {
            for(int i=1;i<=n;i++)
                scanf("%d",&a[i]);
            ans=0;
            scanf("%d",&score);
            for(int i=1;i<=n;i++)
            {
                if(a[i]==score)
                    ans++;
            }
            printf("%d
    ",ans);
        }
        return 0;
    }
    View Code
    时间才能证明一切,选好了就尽力去做吧!
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  • 原文地址:https://www.cnblogs.com/tingxilin/p/11235968.html
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