#include<iostream.h>
void main(){
	int day;
	while(cin>>day){
		int k,t;
		long int total=0;
		k=1;
		while((k*(k+1)/2)<day){
			k++;
		}
		t=k*(k+1)/2;
		if(t>day){k=k-1;};
		t=day-((k*(k+1))/2);
		int i;
		for(i=1;i<=k;i++){
			int j;
			for(j=1;j<=i;j++){
				total=total+i;
			}
		}
		total=total+(k+1)*t;
        cout<<day<<' '<<total<<endl;
	}
	
}

• Re:大牛们帮忙看看，为什么老wa呢？ (429) zgalss 2007-07-15 09:39:32