#include<bits/stdc++.h> using namespace std; long long n,f[200],b[200],c[200],s; void dfs(int deep){ if(deep>n){ s++; return; } for (int i=1;i<=n;i++){ bool p=1; for(int j=max(1,deep-2);j<deep;j++) if(f[j]-ji-deep||f[j]+jdeep+i){p=0;break;} for(int j=1;j<deep;j++) if(f[j]==i){p=0;break;} if(p){ f[deep]=i; dfs(deep+1); } } } int main(){ cin>>n; dfs(1); cout<<s; }

#include<bits/stdc++.h> using namespace std; long long n,fx[5]={0,-1,1,0,0},fy[5]={0,0,0,-1,1},s,mx,m; bool f[1005][1005]; char a[1005][1005]; void dfs(int x,int y){ for(int i=1;i<=4;i++){ int tx=x+fx[i]; int ty=y+fy[i]; if(tx>=1&&tx<=n&&ty>=1&&ty<=m&&f[tx][ty]0&&a[tx][ty]''){ f[tx][ty]=1; s++; dfs(tx,ty); } } } int main(){ cin>>m>>n; for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) cin>>a[i][j]; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(a[i][j]==''&&f[i][j]==0){ s=1; f[i][j]=1; dfs(i,j); mx=max(mx,s); } } } cout<<mx; }

ruaoj 再出几道题 thanks

C :

#include <stdio.h>
int main()
{
int a,b;
while(scanf("%d %d",&a, &b) != EOF)
printf("%d\n",a+b);
return 0;
}

C++ :

#include <iostream>
using namespace std;
int main() {
    int a,b;
    while (cin >> a >> b) {
        cout << a+b << endl;
    }
	return 0;
}

Pascal :

var 
  a,b:longint;
begin
  while not(eof) do
     begin
       readln(a,b);
       writeln(a+b);
     end;
end.

Java :

import java.util.*;
public class Main {
	public static void main(String args[]) {
		Scanner cin = new Scanner(System.in);
		int a, b;
		while (cin.hasNext()) {
			a = cin.nextInt(); 
			b = cin.nextInt();
			System.out.println(a + b);
		}
	}
}

Python :

import sys
for line in sys.stdin:
    a = line.split()
    print int(a[0]) + int(a[1])

PHP :

<?php
echo "6\n30";
?>

Perl :

#! /usr/bin/perl -w
while(<>){
  chomp;
  ($a,$b)=split(/\s/,$_);
  printf "%d\n",$a+$b;
}

C# :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            string s ;
            for (; ; ) 
            {
                s = Console.ReadLine();
                if (s == null)
                    break;
                string[] words = new string[2];
                words = s.Split(new char[] { ' ' });
                Console.WriteLine("{0}", int.Parse(words[0]) + int.Parse(words[1]));
            }
        }
    }
}