https://www.luogu.com.cn/training/100#problems

B2002 Hello,World!

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
    printf("Hello,World!");
    return 0;
}

B2025 输出字符菱形

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
    for(int i=1;i<=3;i++) 
    {
        for(int j=1;j<=3-i;j++) 
            cout<<" ";
        for(int j=1;j<=i*2-1;j++)
            cout<<"*";
        puts("");
    }
    for(int i=2;i>=1;i--)
    {
        for(int j=1;j<=2-i+1;j++) cout<<" ";
        for(int j=1;j<=i*2-1;j++)
            cout<<"*";
        puts("");
    }
    return 0;
}

P1000 超级玛丽游戏

#include<stdio.h>
int main() {
    printf(
    "                ********\n"
    "               ************\n"
    "               ####....#.\n"
    "             #..###.....##....\n"
    "             ###.......######              ###            ###\n"
    "                ...........               #...#          #...#\n"
    "               ##*#######                 #.#.#          #.#.#\n"
    "            ####*******######             #.#.#          #.#.#\n"
    "           ...#***.****.*###....          #...#          #...#\n"
    "           ....**********##.....           ###            ###\n"
    "           ....****    *****....\n"
    "             ####        ####\n"
    "           ######        ######\n"
    "##############################################################\n"
    "#...#......#.##...#......#.##...#......#.##------------------#\n"
    "###########################################------------------#\n"
    "#..#....#....##..#....#....##..#....#....#####################\n"
    "##########################################    #----------#\n"
    "#.....#......##.....#......##.....#......#    #----------#\n"
    "##########################################    #----------#\n"
    "#.#..#....#..##.#..#....#..##.#..#....#..#    #----------#\n"
    "##########################################    ############\n"
    );
    return 0;
}

P1001 A+B Problem

#include<stdio.h>
int main(void)
{
    int a,b;
    scanf("%d %d",&a,&b);
    printf("%d",a+b);
    return 0;
}

B2005 字符三角形

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
    string c; cin>>c;
    for(int i=1;i<=3;i++)
    {
        for(int j=1;j<=3-i;j++) cout<<" ";
        for(int j=1;j<=i*2-1;j++) cout<<c;
        puts("");
    }
    return 0;
}

P5703 【深基2.例5】苹果采购

#include<stdio.h>
int main(void)
{
    unsigned long a,b;
    scanf("%lu %lu",&a,&b);
    printf("%lu",a*b);
    return 0;
}

P5704 【深基2.例6】字母转换

#include<stdio.h>
int main(void)
{
    char a;
    a=getchar();
    printf("%c\n",a-32);
    return 0;
}

P5705 【深基2.例7】数字反转

#include<bits/stdc++.h>
using namespace std;
int main(void)
{
    string s; cin>>s;
    reverse(s.begin(),s.end());
    cout<<s;
    return 0;
}

P5706 【深基2.例8】再分肥宅水

#include<stdio.h>
int main(void)
{
    double V;
    int n;
    scanf("%lf %d",&V,&n);
    printf("%.3lf\n%d",V/n,n*2);
    return 0;
}

P5708 【深基2.习2】三角形面积

#include<stdio.h>
#include<math.h>
int main(void)
{
    double a,b,c;
    double sum;
    scanf("%lf %lf %lf",&a,&b,&c);
    sum=(a+b+c)/2.0;
    sum=sum*(sum-a)*(sum-b)*(sum-c);
    printf("%.1lf",sqrt(sum));
    return 0;
}

P5707 【深基2.例12】上学迟到

#include<cstdio>
#include<iostream>
#include<cmath>
using namespace std;
int a1=8*60;
int a2=24*60;
int main(void) 
{
    int s,v; cin>>s>>v;
    int t;
    if(s%v==0) t=s/v;
    else t=s/v+1;
    int temp=a1-t-10;
    if(temp>=0)
    {
        printf("%02d:%02d\n",temp/60,temp%60);
    }
    else
    {
        temp=a2+temp;
        printf("%02d:%02d\n",temp/60,temp%60);
    }
    return 0;
}

B2029 大象喝水

#include<bits/stdc++.h>
using namespace std;
#define pi 3.1415926
int main(void)
{
    double h,r; cin>>h>>r;
    int ans=ceil(20*1000/(h*pi*r*r));
    cout<<ans<<endl;
    return 0;
}

P1425 小鱼的游泳时间

#include<cstdio>
#include<iostream>
using namespace std;
int main(void)
{
    int a,b,c,d; cin>>a>>b>>c>>d;
    int sum1=a*60+b;
    int sum2=c*60+d;
    printf("%d %d\n",(sum2-sum1)/60,(sum2-sum1)%60);
    return 0;
}

P1421 小玉买文具

#include<cstdio>
#include<iostream>
using namespace std;
int main(void)
{
    int a=19;
    int s1,s2; cin>>s1>>s2;
    cout<<(s1*10+s2)/a<<endl;
    return 0;
}

P3954 [NOIP2017 普及组] 成绩

#include<stdio.h>
int main(void)
{
    int A, B,C;
    int sum=0;
    scanf("%d %d %d",&A,&B,&C);
    sum=A*0.2+B*0.3+C*0.5;
    printf("%d",sum);
    return 0;    
}