CareerCup_1.5@1point3acres

5.cpp

#include <cstdio>
#include <cstring>
#include <cstdlib>
using namespace std;

void replace(char *str)
{
	int n = 0;
	int i;
	for(i = 0; str[i] != '\0'; i++)
		if(str[i] == ' ')
			n++;
	if(n == 0)
		return;
	str = (char *)realloc(str, (i + 2 * n) * sizeof(char));
	int j = i - 2, k = i + 2*n - 2;
	while(j >= 0)
	{
		if(str[j] != ' ')
		{
			str[k] = str[j];
			j--;
			k--;
		}
		else
		{
			str[k--] = '0';
			str[k--] = '2';
			str[k--] = '%';
			j--;
		}
	}
	str[i + n - 1];
}

int main()
{
	char *str = (char *)malloc(100 * sizeof(char));
	fgets(str, 100, stdin);
	replace(str);
	printf("%s\n", str);
	return 0;
}