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BZOJ3412: [Usaco2009 Dec]Music Notes乐谱

3412: [Usaco2009 Dec]Music Notes乐谱

Time Limit: 3 Sec  Memory Limit: 128 MB
Submit: 35  Solved: 30
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Description

 

Input

    1行:两个整数NQ.

    2N+1行:第i+l行只有一个整数Bi

    N+2N+Q+I行:第N+i+l行只有一个整数Ti

 

Output

    第1到Q行:对与每个询问,在词问的时间内,奶牛敲击的是哪个音阶?

Sample Input

3 5
2
1
3
2
3
4
0
1

Sample Output

2
3
3
1
1

HINT

 

Source

Silver

题解:

二分这个值即可。我们是c++,可以直接lower_bound

400T水了这么一道T_T

代码:

 1 #include<cstdio> 2 #include<cstdlib> 3 #include<cmath> 4 #include<cstring> 5 #include<algorithm> 6 #include<iostream> 7 #include<vector> 8 #include<map> 9 #include<set>10 #include<queue>11 #include<string>12 #define inf 100000000013 #define maxn 50000+10014 #define maxm 500+10015 #define eps 1e-1016 #define ll long long17 #define pa pair<int,int>18 #define for0(i,n) for(int i=0;i<=(n);i++)19 #define for1(i,n) for(int i=1;i<=(n);i++)20 #define for2(i,x,y) for(int i=(x);i<=(y);i++)21 #define for3(i,x,y) for(int i=(x);i>=(y);i--)22 #define mod 100000000723 using namespace std;24 inline int read()25 {26     int x=0,f=1;char ch=getchar();27     while(ch<0||ch>9){if(ch==-)f=-1;ch=getchar();}28     while(ch>=0&&ch<=9){x=10*x+ch-0;ch=getchar();}29     return x*f;30 }31 int n,m,x,a[maxn];32 int main()33 {34     freopen("input.txt","r",stdin);35     freopen("output.txt","w",stdout);36     n=read();m=read();a[0]=-1;37     for1(i,n)x=read(),a[i]=a[i-1]+x;38     while(m--)printf("%d\n",lower_bound(a+1,a+n+1,read())-a);39     return 0;40 }
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BZOJ3412: [Usaco2009 Dec]Music Notes乐谱