poj3273Monthly Expense

http://poj.org/problem?id=3273

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 1 #include <iostream>

 2 #include<cstdio>

 3 #include<cstring>

 4 #include<stdlib.h>

 5 #include<cmath>

 6 using namespace std;

 7 int num[100010],n,m;

 8 int judge(int mid)

 9 {

10     int i,s=0,k=1;

11     for(i = 1 ; i <= n ; i++)

12     {

13         s+=num[i];

14         if(s>mid)

15         {

16             s = num[i];

17             k++;

18         }

19     }

20     if(k>m)

21        return 1;

22     else

23        return 0;

24 }

25 int main()

26 {

27     int i,j;

28     while(cin>>n>>m)

29     {

30         int high=0,low=0;

31         for(i = 1; i <= n ;i++)

32         {

33                 cin>>num[i];

34                 high+=num[i];

35                 if(num[i]>low)

36                     low = num[i];

37         }

38         int mid = (low+high)/2;

39         while(low<high)

40         {

41             if(judge(mid))

42             low = mid+1;

43             else

44             high = mid-1;

45             mid = (low+high)/2;

46         }

47         cout<<mid<<endl;

48     }

49     return 0;

50 }