poj2192

简单题

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

#define maxn 405

char a[maxn], b[maxn], c[maxn];
bool found;

void work(int ap, int bp, int cp)
{
    if (found)
        return;
    if (cp == -1)
    {
        found = true;
        return;
    }
    if (ap >= 0 && c[cp] == a[ap])
        work(ap - 1, bp, cp - 1);
    if (bp >= 0 && c[cp] == b[bp])
        work(ap, bp - 1, cp - 1);
}
int main()
{
    //freopen("t.txt", "r", stdin);
    int t;
    scanf("%d", &t);
    for (int i = 0; i < t; i++)
    {
        scanf("%s", a);
        scanf("%s", b);
        scanf("%s", c);
        found = false;
        work(strlen(a) - 1, strlen(b) - 1, strlen(c) - 1);
        printf("Data set %d: ", i + 1);
        if (found)
            printf("yes\n");
        else
            printf("no\n");
    }
    return 0;
}