#include namespace DECLARATIONS { using namespace std; using ll = long long; using PI = pair; template using V = vector; using VI = V; #define _1 first #define _2 second #ifdef MY_DEBUG # define DEBUG(x) x #else # define DEBUG(x) #endif template inline void debug(T &A) { DEBUG( for (const auto &a : A) { cerr << a << " "; } cerr << '\n'; ) } template inline void debug_dim2(T &A) { DEBUG( for (const auto &as : A) { debug(as); } ) } template inline void debug(const char *format, Args const &... args) { DEBUG( fprintf(stderr, format, args ...); cerr << '\n'; ) } template string format(const std::string &fmt, Args ... args) { size_t len = std::snprintf(nullptr, 0, fmt.c_str(), args ...); std::vector buf(len + 1); std::snprintf(&buf[0], len + 1, fmt.c_str(), args ...); return std::string(&buf[0], &buf[0] + len); } } using namespace DECLARATIONS; const int MOD = 1000000007; class BIT { public: int N; V bit; BIT(int n): N(n + 1), bit(N) {} void add(int i, int x) { i++; while(i < N) { bit[i] += x; i += i & -i; } } ll query(int i) { ll ans = 0ll; while(i) { ans += bit[i]; i -= i & -i; } return ans; } }; int main() { std::ios::sync_with_stdio(false); cin.tie(nullptr); int N, Q; cin >> N >> Q; BIT bit = BIT(N); for (int i = 0; i < N; ++i) { int a; cin >> a; bit.add(i, a); } set dis; for (int i = 0; i <= N; ++i) { dis.insert(i); } for (int i = 0; i < Q; ++i) { int t, x; cin >> t >> x; x--; if (t == 1) { dis.erase(x + 1); } else if (t == 2) { dis.insert(x + 1); } else if (t == 3) { bit.add(x, 1); } else { auto r = dis.lower_bound(x + 1); auto l = prev(r); debug("[%d,%d)", *l, *r); ll v = bit.query(*r) - bit.query(*l); cout << v << '\n'; } debug(dis); } return 0; }