学步园

水题~

#include <cstdio>
#include <cstring>

using namespace std;

const int MAXW = 1024;
const int MAXL = 1024000;

int nw;
bool ok;
char input[MAXL];
char word[MAXW][MAXL];

void work(int start,int end)
{
if (start > end) return;

if (start == end && word[start][0] == 'w')
    {
int f = strchr(word[start],'(') - word[start];
int e = strchr(word[start],')') - word[start];
for (int i = f + 2;i < e - 1;i++)
        {
            ok = true;
            printf("%c",word[start][i]);
        }
return;
    }

int cntif = 0;
int idx = -1;

for (int i = start + 1;i <= end;i++)
if (word[i][0] == 'i') cntif++;
else if (word[i][0] == 'e')
        {
if (cntif == 0)
            {
                idx = i;
break;
            }
            cntif--;
        }

if (word[start][3] == '1')
    {
if (idx == -1) work(start + 1,end);
else work(start + 1,idx - 1);
    }
else
if (idx != -1)
            work(idx + 1,end);
}

int main()
{
int idx;
while (gets(input))
    {
        nw = 0;
for(idx = 0;input[idx] && input[idx] == ' ';idx++) ;
for (int i = idx;input[i];i++)
if (i == 0 || (input[i-1] == ' ' && input[i] != ' '))
                sscanf(input + i,"%s",word[nw++]);
while (gets(input) && strlen(input) != 0)
        {
for(idx = 0;input[idx] && input[idx] == ' ';idx++) ;
for (int i = idx;input[i];i++)
if (i == 0 || (input[i-1] == ' ' && input[i] != ' '))
                    sscanf(input + i,"%s",word[nw++]);
        }

        ok = false;
        work(0,nw - 1);
if(ok) printf("\n");
    }
return 0;
}