ACM篇：UVa 839 -- Not so Mobile

#include <iostream>#include <cstdio>#include <vector>#include <algorithm>#include <cstring>#include <sstream>#include <cmath>using namespace std;bool failed;int _solve(){    int w1, d1, w2, d2;    scanf("%d%d%d%d", &w1, &d1, &w2, &d2);    if (!w1)        w1 = _solve();    if (!w2)        w2 = _solve();    if (w1 * d1 != w2 * d2)        failed = true;    return w1 + w2;}int main(){    int T;    scanf("%d", &T);    while (T-- > 0)    {        failed = false;        _solve();        printf("%s\n", (failed) ? "NO" : "YES");        if (T)            putchar('\n');    }    return 0;}