HDU 1611 敌兵布阵【线段树模板】

#include<cstdio>
#include<string>
#include<cstdlib>
#include<cmath>
#include<iostream>
#include<cstring>
#include<set>
#include<queue>
#include<algorithm>
#include<vector>
#include<map>
#include<cctype>
#include<stack>
#include<sstream>
#include<list>
#include<numeric>
#define debug() puts("++++")
#define gcd(a,b) __gcd(a,b)
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define fi first
#define se second
#define pb push_back
#define sqr(x) ((x)*(x))
#define ms(a,b) memset(a,b,sizeof(a))
#define sz size()
#define be begin()
#define pu push_up
#define pd push_down
#define cl clear()
#define lowbit(x) -x&x
#define all 1,n,1
#define rep(i,x,n) for(int i=(x); i<(n); i++)
#define in freopen("in.in","r",stdin)
#define out freopen("out.out","w",stdout)
using namespace std;
typedef long long ll;
typedef unsigned long long ULL;
typedef pair<int,int> P;
const int INF = 0x3f3f3f3f;
const ll LNF = 1e18;
const int maxn = 1e5;
const int maxm = 1e6 + 10;
const double PI = acos(-1.0);
const double eps = 1e-8;
const int dx[] = {-1,1,0,0,1,1,-1,-1};
const int dy[] = {0,0,1,-1,1,-1,1,-1};
int dir[4][2] = {{0,1},{0,-1},{-1,0},{1,0}};
const int mon[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
const int monn[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int sum[maxn<<2];

void PushUp(int rt)
{
    sum[rt]=sum[rt<<1]+sum[rt<<1|1];
}
void build(int l,int r,int rt)
{
    if(l==r)
    {
        scanf("%d",&sum[rt]);
        return ;
    }
    int m = (l+r)>>1;
    build(lson);
    build(rson);
    PushUp(rt);
}
void update(int p,int add,int l,int r,int rt)
{
    if(l==r)
    {
        sum[rt] += add;
        return ;
    }
    int m = (l+r)>>1;
    if(p<=m) update(p,add,lson);
    else update(p,add,rson);
    PushUp(rt);
}
int query(int L,int R,int l,int r,int rt)
{
    if(L<=l && r<=R)
    {
        return sum[rt];
    }
    int m = (l+r)>>1;
    int ans = 0;
    if(L<=m) ans += query(L,R,lson);
    if(R>m) ans += query(L,R,rson);
    return ans;
}

int main()
{
    int T,n;
    scanf("%d",&T);
    for(int cas=1;cas<=T;cas++)
    {
        printf("Case %d:\n",cas);
        scanf("%d",&n);
        build(1,n,1);
        char op[15];
        while(scanf("%s",op))
        {
            if(op[0]=='E') break;
            int a,b;
            scanf("%d%d",&a,&b);
            if(op[0]=='Q')
            {
                printf("%d\n",query(a,b,1,n,1));
            }
            else if(op[0]=='S') update(a,-b,1,n,1);
            else update(a,b,1,n,1);
        }
    }
}