【POJ】2796 Feel Good

 1 #include<cstdio>

 2 #define MAXN 100010

 3 typedef __int64 LL;

 4 struct node

 5 {

 6     LL w,h;

 7     int x,y;

 8 };

 9 node st[MAXN];

10 int main()

11 {

12     node temp;

13     LL ans,wide;

14     int n,i,top,x,y,R;

15     while(~scanf("%d",&n))

16     {

17         ans=top=-1;

18         for(i=0;i<n;i++)

19         {

20             scanf("%I64d",&temp.h);

21             temp.w=temp.h;

22             temp.x=temp.y=i;

23             if(top>-1)

24                 R=st[top].y;

25             for(wide=0;top>-1&&st[top].h>=temp.h;top--)

26             {

27                 wide+=st[top].w;

28                 if(wide*st[top].h>ans)

29                 {

30                     ans=wide*st[top].h;

31                     x=st[top].x;

32                     y=R;

33                 }

34             }

35             if(wide)

36             {

37                 temp.w+=wide;

38                 temp.x=st[top+1].x;

39             }

40             st[++top]=temp;

41         }

42         if(top>-1)

43         {

44             R=st[top].y;

45             for(wide=0;top>-1;top--)

46             {

47                 wide+=st[top].w;

48                 if(wide*st[top].h>ans)

49                 {

50                     ans=wide*st[top].h;

51                     x=st[top].x;

52                     y=R;

53                 }

54             }

55         }

56         printf("%I64d\n%d %d\n",ans,x+1,y+1);

57     }

58     return 0;

59 }