hdu5050_2014ACM上海__Divided Land

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原题见hdu5050

代码：

#include <iostream>#include <stdio.h>#include <string.h>#include <vector>#include <map>#include <algorithm>#include <queue>#include <cmath>#include <bitset>using namespace std;#define INF 0x3f3f3f3f#define ll long long int#define ui unsigned long#define ull unsigned long long #define MEM(a) memset(a, 0, sizeof(a))#define MEMM(a) memset(b, -1, sizeof(b))#define DBG(x, n) cout << (x) << " " << (n) << endl;#define SL(a) strlen(a)#define RS(s) scanf("%s", (s))#define PI(r) printf("%d\n", (r))#define RI(a) scanf("%d", &(a))#define RII(a, b) scanf("%d%d", &(a), &(b))#define RIII(a, b, c) scanf("%d%d%d", &(a), &(b), &(c))#ifdef ONLINE_JUDGE#define FOI(file) 0#define FOW(file) 0#else#define FOI(file) freopen(file,"r",stdin);#define FOW(file) freopen(file,"w",stdout);#endif#define N 1001bitset <1001> w;bitset <1001> h;bitset <1001> d;void bitsetSubtract(bitset<N> &x, const bitset<N> &y) {    bool borrow = false;    for (int i = 0; i < N; i++) {        if (borrow) {            if (x[i]) {                x[i] = y[i];                borrow = y[i];            } else {                x[i] = !y[i];                borrow = true;            }        } else {            if (x[i]) {                x[i] = !y[i];                borrow = false;            } else {                x[i] = y[i];                borrow = y[i];            }        }    }}bitset<N> gcd(bitset<N> u, bitset<N> v) {    bitset<N> one (string("1"));    bitset<N> zero (string("0"));    int shift;    if (u == 0) return v;    if (v == 0) return u;    for (shift = 0; ((u | v) & one) == zero; ++shift) {        u >>= 1;        v >>= 1;    }    while ((u & one) == zero) u >>= 1;    do {        while ((v & one) == zero) v >>= 1;        string t1 = u.to_string<char, char_traits<char>, allocator<char> >();        string t2 = v.to_string<char, char_traits<char>, allocator<char> >();        if (t1 > t2) {            bitset<N> t = v;            v = u;            u = t;        }        bitsetSubtract(v,u);    } while (v != 0);    return u << shift;}int main(){    //FOI("input");    //FOW("output");    //write your programme here        int t;    scanf("%d", &t);    int i;    int j;        for(i = 1; i <= t; i++)    {        cin >> w >> h;        d = gcd(w, h);        printf("Case #%d: ", i);        // cout << d << endl;        j = 1000;        while(d[j] != 1)            j--;        while(j != -1)        {            cout << d[j];            j --;        }        cout << endl;    }    return 0;}