記錄杭電ACM的部分答案,純手寫，如有雷同，算你抄我的。o(∩_∩)o

1001

問題描述

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scan=new Scanner(System.in);    
        int a;
        while(scan.hasNextInt()){
            a=scan.nextInt();
            System.out.println(sum(a));
            System.out.println();
        }
    }

    static
 
 int sum(int a){
        int sum=0;
        for(int i=1;i<=a;i++){
            sum+=i;
        }
        return sum;
    }

}

1002

問題描述

import java.math.BigInteger;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scan=new Scanner(System.in);
        int
 
 a=scan.nextInt();
        if(a>=1&&a<=20){
            BigInteger[] a1 =new BigInteger[a+1];
            BigInteger[] a2 =new BigInteger[a+1];
            for(int i=1;i<=a;i++){
                a1[i]=scan.nextBigInteger();
                a2[i]=scan.nextBigInteger();
            }
            for
 
(int i=1;i<a;i++){
                System.out.println("Case"+" "+i+":\r\n"+
            a1[i]+" + "+a2[i]+" = "+a1[i].add(a2[i])+"\r\n");
            }
            System.out.println("Case"+" "+a+":\r\n"+
                    a1[a]+" + "+a2[a]+" = "+a1[a].add(a2[a]));
        }else{
            System.out.println(0);
        }

    }
}

1003

問題描述

import java.io.BufferedInputStream;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan=new Scanner(new BufferedInputStream(System.in));
        int count=scan.nextInt();
        int[] result=new int[count*3];
        if(count>20&&count<1)
            return ;
        int n=0;
        while(count-->0){
            int thissum=0,maxsum=0,mstart=1,mend=1,mtemp=1;
            int N=scan.nextInt();
            for(int i=1;i<=N;i++){
                int tmp=scan.nextInt();
                thissum+=tmp;
                if(thissum<0){
                    thissum=0;
                    mtemp=i+1;
                }
                if(thissum>maxsum){
                    maxsum=thissum;
                    mend=i;
                    mstart=mtemp;
                }
            }           
            result[n*3+0]=maxsum;
            result[n*3+1]=mstart;
            result[n*3+2]=mend;
            n++;
        }   
        for(int k=0;k<n;k++){
            System.out.println("Case "+(k+1)+":");
            System.out.println(result[k*3+0]+" "+result[k*3+1]+" "+result[k*3+2]);
            if(k!=n-1){
                System.out.println();
            }
        }
    }
}

1004

問題描述

import java.io.BufferedInputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class Main {

    public static void main(String[] args) {
        Scanner scan=new Scanner(new BufferedInputStream(System.in));

        while(scan.hasNext()){
            int count=scan.nextInt();
            if(count==0){
                break;
            }
            Map<String, Integer> map=new HashMap<String, Integer>();
            while(count-->0){
                String str=scan.next();
                int tmp=0;
                if(map.containsKey(str)){
                    tmp=map.get(str)+1;
                }else{
                    tmp=0;
                }
                map.put(str, tmp);
            }
            String result=null;
            int max=-1;
            Set<String> keys=map.keySet();
            for(String s:keys){
                if(map.get(s)>max){
                    max=map.get(s);
                    result=s;
                }
            }
            System.out.println(result);
        }
        scan.close();
    }
}