HDOJ 1069 Monkey and Banana
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题意:在高度为h处有一串香蕉,猴子想要拿到它,但是他的高度不够,需要通过长方体木块的堆积才能拿到,已知有n钟长宽高分别为x,y,z的长方体木块,每种木块的个数足够多,判断这些木块可以堆叠的最大高度
链接:http://acm.hdu.edu.cn/showproblem.php?pid=1069
思路:动态规划。对每个长方形进行六种旋转,在对底上的中一条边进行排序,求出最大可能。
注意点:旋转方向六种,分别为(x,y,z),(x,z,y),(y,x,z),(y,z,x),(z,x,y),(z,y,x)
以下为AC代码:
Run IDSubmit TimeJudge StatusPro.IDExe.TimeExe.MemoryCode Len.LanguageAuthor116225902014-09-09 00:53:51Accepted106915MS412K2080 BG++luminous11#include <iostream>#include <cstdio>#include <string>#include <cstring>#include <iostream>#include <cstring>#include <cstdio>#include <string>#include <vector>#include <deque>#include <list>#include <map>#include <set>#include <queue>#include <stack>#include <cmath>#include <ctime>#include <cctype>#include <climits>#include <iomanip>#include <cstdlib>#include <algorithm>//#include <unordered_map>//#include <unordered_set>#define ll long long#define ull unsigned long long#define all(x) (x).begin(), (x).end()#define clr(a, v) memset( a , v , sizeof(a) )#define pb push_back#define RDI(a) scanf ( "%d", &a )#define RDII(a, b) scanf ( "%d%d", &a, &b )#define RDIII(a, b, c) scanf ( "%d%d%d", &a, &b, &c )#define RS(s) scanf ( "%s", s )#define PI(a) printf ( "%d", a )#define PIL(a) printf ( "%d\n", a )#define PII(a,b) printf ( "%d %d", a, b )#define PIIL(a,b) printf ( "%d %d\n", a, b )#define PIII(a,b,c) printf ( "%d %d %d", a, b, c )#define PIIIL(a,b,c) printf ( "%d %d %d\n", a, b, c )#define PL() printf ( "\n" )#define PSL(s) printf ( "%s\n", s )#define rep(i,m,n) for ( int i = m; i < n; i ++ )#define REP(i,m,n) for ( int i = m; i <= n; i ++ )#define dep(i,m,n) for ( int i = m; i > n; i -- )#define DEP(i,m,n) for ( int i = m; i >= n; i -- )#define repi(i,m,n,k) for ( int i = m; i < n; i += k )#define REPI(i,m,n,k) for ( int i = m; i <= n; i += k )#define depi(i,m,n,k) for ( int i = m; i > n; i += k )#define DEPI(i,m,n,k) for ( int i = m; i >= n; i -= k )#define READ(f) freopen(f, "r", stdin)#define WRITE(f) freopen(f, "w", stdout)using namespace std;const double pi = acos(-1);template <class T>inline bool RD ( T &ret ){ char c; int sgn; if ( c = getchar(), c ==EOF )return 0; //EOF while ( c != '-' && ( c < '0' || c > '9' ) ) c = getchar(); sgn = ( c == '-' ) ? -1 : 1; ret = ( c == '-' ) ? 0 : ( c - '0' ); while ( c = getchar() , c >= '0' && c <= '9' ) ret = ret * 10 + ( c - '0' ); ret *= sgn; return 1;}inline void PD ( int x ){ if ( x > 9 ) PD ( x / 10 ); putchar ( x % 10 + '0' );}const double eps = 1e-10;const int dir[4][2] = { 1,0, -1,0, 0,1, 0,-1 };struct node{ int x, y, z, s, cnt; node(){} node( int _cnt ) : cnt(_cnt) {} node( int _x, int _y, int _z ) : x(_x), y(_y), z(_z), cnt(_z), s(_x*_y) {} node( int _x, int _y, int _z, int _cnt ) : x(_x), y(_y), z(_z), cnt(_cnt) {} friend bool operator < ( const node &a, const node &b ){ if ( a.x != b.x ) return a.x > b.x; else return a.y > b.y; }};vector<node> k;int main(){ int n; int ncase = 1; while ( RDI ( n ) != EOF && n ){ k.clear(); int x, y, z; rep ( i, 0, n ){ cin >> x >> y >> z; k.push_back( node ( x, y, z ) ); k.push_back( node ( y, x, z ) ); k.push_back( node ( y, z, x ) ); k.push_back( node ( z, y, x ) ); k.push_back( node ( x, z, y ) ); k.push_back( node ( z, x, y ) ); } sort ( all ( k ) ); int ans = 0; rep ( i, 0, k.size() ){ rep ( j, 0, i ){ if ( k[i].x < k[j].x && k[i].y < k[j].y ){ k[i].cnt = max ( k[i].cnt, k[j].cnt + k[i].z ); ans = max ( ans, k[i].cnt ); } } } printf ( "Case %d: maximum height = %d\n", ncase ++, ans ); } return 0;}
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