洛谷oj题单【入门2】分支结构-入门难度(Java)来源:https://www.luogu.com.cn/training/101#problemsP5709 【深基2.习6】Apples Prologue / 苹果和虫子

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int m = sc.nextInt();        int t = sc.nextInt();        int s = sc.nextInt();        if (t == 0)            System.out.println(0);        else {            int apple = (int) Math.ceil(s / t);            if (m <= apple)                System.out.println(0);            else                if(s % t != 0)                    System.out.println(m - apple - 1);                else                    System.out.println(m - apple);        }    }}

P5710 【深基3.例2】数的性质

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int x = sc.nextInt();        //两种都符合        System.out.print(((x % 2 == 0) && ((x > 4) && (x  4) && (x  4) && (x <= 12))) ? 1 : 0);        System.out.printf(" ");        //都不符合        System.out.print(((x % 2 != 0) && ((x  12))) ? 1 : 0);    }}

P5711 【深基3.例3】闰年判断

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n = sc.nextInt();        if(n % 4 == 0 && n % 100 != 0 || n % 400 == 0)            System.out.println(1);        else            System.out.println(0);    }}

P5712[【深基3.例4】Apples

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n = sc.nextInt();        if(n == 0 || n == 1)            System.out.println("Today, I ate "+n+" apple.");        else            System.out.println("Today, I ate "+n+" apples.");    }}

P5713 【深基3.例5】洛谷团队系统

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n = sc.nextInt();        if(11 + 3 * n > 5 * n)            System.out.println("Local");        else System.out.println("Luogu");    }}

P5714 【深基3.例7】肥胖问题

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        double m = sc.nextDouble();        double h = sc.nextDouble();        double BMI = m / (h * h);        if (BMI = 18.5 && BMI < 24)            System.out.println("Normal");        else {            if (BMI - (int) BMI == 0)                System.out.printf("%2.0f\n", BMI);//用题目中给的m=120/h=1.4计算出整数部分不会超过两位,所以占位符取2            else if (BMI * 10 - (int) (BMI * 10) == 0)                System.out.printf("%3.1f\n", BMI);//2位整数+1位小数点,所以占位符取3,保留小数点后1位,以下类推            else if (BMI * 100 - (int) (BMI * 100) == 0)                System.out.printf("%4.2f\n", BMI);            else if (BMI * 1000 - (int) (BMI * 10000) == 0)                System.out.printf("%5.3f\n", BMI);            else                System.out.printf("%6.4f\n", BMI);            //用题目中给的m=120/h=1.4计算出整数部分不会超过两位            //所以6位有效数字最多就是2位整数+4位小数            System.out.println("Overweight");        }    }}

P5715 【深基3.例8】三位数排序

import java.util.Arrays;import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int[] str = new int[3];        for (int i = 0; i < 3; i++) {            str[i] = sc.nextInt();        }        int a = str[0], b = str[1], c = str[2];        Arrays.sort(str);        for (int i=0;i<3;i++)        {            System.out.print(str[i]+" ");        }    }}

P5716 [【深基3.例9】月份天数

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int[] str = {0,31,28,31,30,31,30,31,31,30,31,30,31};//常规年份天数        int y = sc.nextInt();//年        int m = sc.nextInt();//月        if(y % 4 == 0 && y % 100 != 0 || y % 400 == 0 )//判断是否为闰年,方便对2月进行判断            str[2] = 29;        System.out.printf("%d",str[m]);//方便输出    }}

P1085 [NOIP2004 普及组] 不高兴的津津

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int a,b;        int max = 0,res = 0;//分别为最大值,最终结果        for (int i = 0; i  8 && a + b > max){                max = a + b;                res = i + 1;//i以0开头,所以应加1            }        }        System.out.println(res);    }}

P1909 [NOIP2016 普及组] 买铅笔

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n = sc.nextInt(); //数量        //三组数据        int a1 = sc.nextInt();        int a2 = sc.nextInt();        int b1 = sc.nextInt();        int b2 = sc.nextInt();        int c1 = sc.nextInt();        int c2 = sc.nextInt();        //计算钱数        int a = (int) (Math.ceil((double)n/(double)a1) * a2); //第一组        int b = (int) (Math.ceil((double)n/(double)b1) * b2); //第二组        int c = (int) (Math.ceil((double)n/(double)c1) * c2); //第三组        //比较        int min = a<b?a:b;        min = min<c?min:c;        //输出        System.out.println(min);    }}

P1422 小玉家的电费

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int n = sc.nextInt();        double sum = 0;        if(n = 150 && n = 401) {            sum = 150 * 0.4463 + 250 * 0.4663 + (n - 400) * 0.5663;        }        System.out.printf("%.1f",sum);    }}

P1424 小鱼的航程(改进版)

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int x = sc.nextInt();//从周x算起        int n = sc.nextInt();//天数        int sum = 0;        for (int i = 0; i < n; i++) {            //在循环中进行星期的判断            switch (x){                case 1:case 2:case 3:case 4:case 5:sum += 250;//工作日接着游泳                case 6:x++;continue;//周六休息                case 7:x = 1;continue;//周日重置为周一,并且休息不游泳            }            x++;//进入下一天        }        System.out.println(sum);    }}

P1888 三角函数

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int a = sc.nextInt();        int b = sc.nextInt();        int c = sc.nextInt();        int min = 0,max = 0;        //求最小边        min = a < b ? a : b;        min = min  b ? a : b;        max = max > c ? max :c;        //辗转相除法求最大公因子        int n = 0;        for (int i = 1; i < min; i++) {            if(max % i == 0 && min % i ==0){                n = i;            }        }        System.out.println(min/n+"/"+max/n );    }}

P1046 [NOIP2005 普及组] 陶陶摘苹果

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        int[] arr = new int[10];        for (int i = 0; i < arr.length; i++) {            arr[i] = sc.nextInt();        }        int n = sc.nextInt();//总高度        int num = 0;//个数        for (int i = 0; i = arr[i])                num++;        }        System.out.println(num);    }}

P4414 [COCI2006-2007#2] ABC

import java.util.Scanner;import java.util.Arrays;public class Main {    public static void main(String[] args) {        Scanner in = new Scanner(System.in);        int[] a = new int[3];        a[0] = in.nextInt();        a[1] = in.nextInt();        a[2] = in.nextInt();        Arrays.sort(a);//排序        String str = in.next();        char ch1 = str.charAt(0);//第一个字母        char ch2 = str.charAt(1);//第二个字母        char ch3 = str.charAt(2);//第三个字母        System.out.println(a[ch1 - 'A'] + " " + a[ch2 - 'A'] + " " + a[ch3 - 'A']);    }}