2000.txt

北大ACM题目例程 详细的解答过程 程序实现 算法分析

#include<stdio.h>
#include<stdlib.h>

#define debug 0


#define NMAX 10003

        
int main()
{
#if debug 	
	freopen("in.txt","r",stdin);
	freopen("out.txt","w",stdout);
#endif
    int sum;
	int flag=1;
    int k=1;
    int i=1;
    int j=1;
    int in;
   	
    scanf("%d",&in);
    while(in)
    {
    	flag=0;
    	sum=0;
    	i=1;j=1;
	    while(1)
	    {
	    	for(k=1;k<=i;k++)
	    	{
	    		sum+=i;

	    		if(j==in)
	    		{
	    			printf("%d %d\n",in,sum);
	    			flag=1;
	    			break;
	    					
	    		}
	    		
	    		j++;
	    		
	    	}
	    	if(flag==1)
	    			break;
	    	i++;
	    }
    
    	
    	scanf("%d",&in);
    }
    	
#if debug
	fclose(stdin);
	fclose(stdout);
#endif
	return 1;
}