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Create 1166.cpp

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Kirigaya Kazuto 2016-04-21 11:05:00 +08:00
parent a83f297311
commit a6318e2864
1 changed files with 92 additions and 0 deletions
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#include <cstdio>
#include <cstdlib>
#include <cstring>
using namespace std;
int C[131072];
char cmd[32];
int getsum(int left,int right,int pos,int leftbound,int rightbound)
{
if(left<=leftbound&&right>=rightbound)
{
return C[pos];
}
if(right<leftbound||left>rightbound)
{
return 0;
}
int a=getsum(left,right,2*pos+1,leftbound,(leftbound+rightbound)/2);
int b=getsum(left,right,2*pos+2,(leftbound+rightbound)/2+1,rightbound);
return a+b;
}
int main()
{
int t;
scanf("%d",&t);
for(int itt=1;itt<=t;itt++)
{
printf("Case %d:\n",itt);
int N;
scanf("%d",&N);
int realn=1;
while(realn<N)
{
realn*=2;
}
memset(C,0,sizeof(int)*realn);
for(int i=0;i<N;i++)
{
scanf("%d",&C[realn-1+i]);
}
int start=(realn-1)/2;
while(start>0)
{
int L=start+1;
for(int i=0;i<L;i++)
{
C[start+i]=C[2*(start+i)+1]+C[2*(start+i)+2];
}
start=(start-1)/2;
}
C[0]=C[1]+C[2];
while(scanf("%s",cmd)==1)
{
if(strcmp(cmd,"End")==0)
{
break;
}
int a,b;
scanf("%d %d",&a,&b);
if(strcmp(cmd,"Query")==0)
{
int ans=getsum(a-1,b-1,0,0,realn-1);
printf("%d\n",ans);
}
else if(strcmp(cmd,"Add")==0)
{
int pos=realn-1+a-1;
while(pos>0)
{
C[pos]+=b;
pos=(pos-1)/2;
}
C[0]+=b;
}
else if(strcmp(cmd,"Sub")==0)
{
int pos=realn-1+a-1;
while(pos>0)
{
C[pos]-=b;
pos=(pos-1)/2;
}
C[0]-=b;
}
}
}/// end of for(...)
return 0;
}