每日一水~ 2012-4-24 HDU2002 HDU1004

HDU2002:

#import <stdio.h>
#define PI 3.1415927
double r;
int main() {while (~scanf("%lf",&r)) {printf("%.3lf\n",(4.0/3.0)*PI*r*r*r);}}

HDU 1004:

#import <stdio.h>
#import <string.h>

int n;

struct word {
	int num;
	char w[16];	
}wordlist[1001];

int tot;

char tmp[16];

int main() {
	while (scanf("%d",&n),n) {
		tot=0;
		for (int i=0; i<n; ++i) {
			scanf("%s",tmp);
			int flag=0;
			for (int j=0; j<tot; ++j) {
				if(strcmp(wordlist[j].w,tmp)==0) {wordlist[j].num++; flag=1; break;}
			}
			if(!flag) {
				wordlist[tot].num=1;
				strcpy(wordlist[tot++].w,tmp);
			}
		}	
		int max=-1, maxp =-1;
		for (int i=0; i<tot; ++i) {
			if(wordlist[i].num > max) {max=wordlist[i].num; maxp=i;}
		}
		printf("%s\n",wordlist[maxp].w);
	}
}