[2016-02-19][UVA][11059][Maximum Product]
[2016-02-19][UVA][11059][Maximum Product]
- 时间:2016-02-19 00:32:21 星期五
- 题目编号:UVA 11059
- 题目大意:
- 给定n,和长度为n 的序列,求最长连续序列,使得乘积最大,如果乘积为负数,则输出0
- 分析:
- 最多18个数字,每个数字最大为10最小为-10,所以可以用longlong 保存
- 方法:暴力枚举位置:i,j,累乘i~j范围内的数字
- 解题过程遇到问题:
- 刚开始枚举j的时候是0~n-1枚举,没考虑到j >= i,会出现j < i的时候,res直接被赋值1,(o(︶︿︶)o 写挫...),j改成i~n-1就可以了
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #include <vector>#include <list>#include <map>#include <set>#include <deque>#include <queue>#include <stack>#include <bitset>#include <algorithm>#include <functional>#include <numeric>#include <utility>#include <sstream>#include <iostream>#include <iomanip>#include <cstdio>#include <cmath>#include <cstdlib>#include <cctype>#include <string>#include <cstring>#include <cstdio>#include <cmath>#include <cstdlib>#include <ctime>using namespace std;typedef long long LL;#define CLR(x,y) memset((x),(y),sizeof((x)))#define FOR(x,y,z) for(int (x)=(y);(x)<(z);(x)++)#define FORD(x,y,z) for(int (x)=(y);(x)>=(z);(x)--)#define FOR2(x,y,z) for((x)=(y);(x)<(z);(x)++)#define FORD2(x,y,z) for((x)=(y);(x)>=(z);(x)--)const int maxn = 18 + 2;int main(){ int n,a[maxn],cntcase = 0; while(~scanf("%d",&n)){ FOR(i,0,n) scanf("%d",&a[i]); LL res = 0; FOR(i,0,n){ FOR(j,i,n){ LL tmp = 1; FOR(k,i,j+1) tmp *= a[k]; if(res < tmp) res = tmp; } } printf("Case #%d: The maximum product is %lld.\n\n",++cntcase,res); } return 0;} |
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