【树状数组】单点更新区间查询

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <string.h>
#include <iostream>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <algorithm>
const double PI=acos(-1.0);///3.141593
const long long MOD=(long long)1E9+7LL;///1000000007template <class T> T Susake_pow(T a,T b)///pow
{T res;if(b==0) return 1;else while((b&1)==0){b>>=1;a*=a;}res=a;b>>=1;while(b!=0){a*=a;if((b&1)!=0)res*=a;b>>=1;}return res;}
template<class T> inline T gcd(T a,T b)///gcd
{if(a<0)return gcd(-a,b);if(b<0)return gcd(a,-b);return (b==0)?a:gcd(b,a%b);}
template<class T> inline T lcm(T a,T b)///lcm
{if(a<0)return lcm(-a,b);if(b<0)return lcm(a,-b);return a*(b/gcd(a,b));}int isdigit(int c);int islower(int c);int isupper(int c);int tolower(int c);int toupper(int c);
///union_find
int fa[1];
template <class T> inline T union_find(T x)
{return fa[x] == x ? x : fa[x] = union_find(fa[x]);}
///tree array
int t_a[200001], t_c[200001];
int t_n;
template <class T> inline T lowbit(T x){return x&(-x);}
void update(int p,int x){while(p<=t_n){t_c[p]+=x;p+=lowbit(p);}}
template <class T> inline T sum(T p){T s=0;while(p>0){s+=t_c[p];p-=lowbit(p);}return s;}

int main(int argc, char *argv[])
{
    int t;
    scanf("%d", &t);
    char s[100];
    for(int z = 1; z <= t; z++)
    {
        memset(t_a, 0, sizeof(t_a));
        memset(t_c, 0, sizeof(t_c));
        scanf("%d", &t_n);
        for(int i = 1; i <= t_n; i++)
        {
            t_a[i] += 0;
            update(i, 0);
        }
        for(int i = 1; i <= t_n; i++)
        {
            int x;
            scanf("%d%*c", &x);
            t_a[i] += x;
            update(i, x);
        }
        printf("Case %d:\n", z);
        while(scanf("%s", s))
        {
            if(strcmp(s, "End") == 0) break;
            if(strcmp(s, "Add") == 0)
            {
                int j, k;
                scanf("%d%d", &j, &k);
                t_a[j] += k;
                update(j, k);
            }
            if(strcmp(s, "Sub") == 0)
            {
                int j, k;
                scanf("%d%d", &j, &k);
                t_a[j] -= k;
                update(j, -k);
            }
            if(strcmp(s, "Query") == 0)
            {
                int j, k;
                scanf("%d%d", &j, &k);
                printf("%d\n", sum(k) - sum(j - 1));
            }
        }
        getchar();
    }
    return 0;
}