// hdu 1166 敌兵布阵 线段树 点更新 // // 这道题裸的线段树的点更新,直接写就可以了 // // 一直以来想要进线段树的坑,结果一直没有跳进去,今天算是跳进去吧, // 虽然十分简单,十分的水,继续加油 #include <algorithm> #include <bitset> #include <cassert> #include <cctype> #include <cfloat> #include <climits> #include <cmath> #include <complex> #include <cstdio> #include <cstdlib> #include <cstring> #include <ctime> #include <deque> #include <functional> #include <iostream> #include <list> #include <map> #include <numeric> #include <queue> #include <set> #include <stack> #include <vector> #define ceil(a,b) (((a)+(b)-1)/(b)) #define endl '\n' #define gcd __gcd #define highBit(x) (1ULL<<(63-__builtin_clzll(x))) #define popCount __builtin_popcountll typedef long long ll; using namespace std; const int MOD = 1000000007; const long double PI = acos(-1.L); template<class T> inline T lcm(const T& a, const T& b) { return a/gcd(a, b)*b; } template<class T> inline T lowBit(const T& x) { return x&-x; } template<class T> inline T maximize(T& a, const T& b) { return a=a<b?b:a; } template<class T> inline T minimize(T& a, const T& b) { return a=a<b?a:b; } const int maxn = 4 * 50008; int n; int sum[maxn]; void build(int root,int L,int R){ if (L==R){ scanf("%d",&sum[root]); return; } int M = L + (R - L) / 2; build(root * 2,L,M); build(root * 2 + 1, M+1,R); sum[root] = sum[root * 2] + sum[root * 2 + 1]; } void init(){ scanf("%d",&n); build(1,1,n); } int p,num; void add_num(int root,int L,int R){ if (L==R){ sum[root] += num; return; } int M = L + (R - L) / 2; if (p<=M)add_num(root*2,L,M); else add_num(root*2+1,M+1,R); sum[root] = sum[root * 2] + sum[root * 2 + 1]; } int query(int root,int ql,int qr,int L,int R){ if (ql<=L&&R<=qr){ return sum[root]; } int M = L + (R - L) / 2; int ans = 0; if (ql<=M) ans += query(root*2,ql,qr,L,M); if (M<qr) ans += query(root*2+1,ql,qr,M+1,R); return ans; } void solve(){ char s[10]; int x,y; int i = 0; while(1){ scanf("%s",s); // cout << i << endl; if (s[0]=='Q'){ scanf("%d%d",&x,&y); // cout << i << endl; printf("%d\n",query(1,x,y,1,n)); }else if (s[0]=='A'){ scanf("%d%d",&x,&y); p = x; num = y; add_num(1,1,n); }else if (s[0]=='S'){ scanf("%d%d",&x,&y); p = x; num = -y; add_num(1,1,n); }else { break; } } } int main() { int t; //freopen("G:\\Code\\1.txt","r",stdin); scanf("%d",&t); int kase=1; while(t--){ init(); printf("Case %d:\n",kase++); solve(); } return 0; }
时间: 2024-10-12 14:35:41