oj.uz

Submission #1045553

# Submission time Handle Problem Language Result Execution time Memory
1045553 2024-08-06T05:38:30 Z mychecksedad Street Lamps (APIO19_street_lamps) C++17
20 / 100
 5000 ms 137416 KB 
/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
const int N = 2e6+100, M = 3e5+10, K = 52, MX = 30;
    
struct Node{
    int X, sum = 0, sum2 = 0;
    int Y, val;
    Node *L, *R;
    Node(){}
    Node(int key, int val) : X(key), Y(rand()), L(nullptr), R(nullptr), val(val), sum(key * val), sum2(val) {}
};
typedef Node* Nodep; 
    
#define upd_sz(_v) {if(_v){_v->sum = _v->val * _v->X;_v->sum2 = _v->val;if(_v->L) _v->sum += _v->L->sum;if(_v->R) _v->sum += _v->R->sum;if(_v->L) _v->sum2 += _v->L->sum2;if(_v->R) _v->sum2 += _v->R->sum2;}}
    
inline pair<Nodep, Nodep> split(Nodep v, int key){
    if(!v){
        return {v, v};
    }
    else if(v->X <= key){
        auto p = split(v->R, key);
        v->R = p.first;
        upd_sz(v);
        return {v, p.second};
    }else{
        auto p = split(v->L, key);
        v->L = p.second;
        upd_sz(v);
        return {p.first, v};
    }
}
    


int query(Nodep p, int key){
  int val = 0;
  while(p){
    if(p->X <= key){
      val += p->val * key - p->val * p->X;
      if(p->L) val += p->L->sum2 * key - p->L->sum;
      p = p->R;
    }else{
      p = p->L;
    }  
  }
  return val;
}
 
inline Nodep insert(Nodep v, Nodep it){
    if(!v) return it;
    if(v->Y > it->Y){
    if(v->X <= it->X) v->R = insert(v->R, it);
    else v->L = insert(v->L, it);
    upd_sz(v);
    return v;
    }else{
    auto a = split(v, it->X);
    it->L = a.ff;
    it->R = a.ss;
    upd_sz(it);
    }
    return it;
}
    
inline void dfs(Nodep t){
    if(t->L) dfs(t->L);
    if(t->R) dfs(t->R);
    free(t);
}
    
inline void dfs2(Nodep t){
    // if(t->L)
    // cout << "go left: ";
    if(t->L) dfs2(t->L);
    // cout << "par: ";
    // cout << t->Y << ' ';
    // if(t->R)
    // cout << "go right: ";
    if(t->R) dfs2(t->R);
}
    
    
int n, q, ans[M];
string s;
Nodep T[N];
    
inline void build(int l, int r, int k){
    if(l == r){
    T[k] = new Node(0, 0);
    return;
    }
    int m = l+r>>1;
    build(l, m, k<<1);
    build(m+1, r, k<<1|1);
    T[k] = new Node(0, 0);
}
    
inline void upd(int l, int r, int p, int k, int t1, int t2){
    if(!(l == 1 && r == n + 1)){
        Nodep A = new Node(t1, 1);
        Nodep B = new Node(t2, -1);
        T[k] = insert(T[k], A);
        T[k] = insert(T[k], B);
    }
    // dfs2(T[k]);en;en;
    // cout << "insert:" << l << ' ' << r << ' ' << p << ' ' << t1 << ' ' << t2 << '\n';
    
    if(l == r){
    return;
    }
    int m = l+r>>1;
    if(p <= m) upd(l, m, p, k<<1, t1, t2);
    else upd(m+1, r, p, k<<1|1, t1, t2);
}
    
inline int get(int l, int r, int p, int k, int tm){
    if(l == r){
    return query(T[k],tm); 
    }
    // dfs2(T[k]);en;en;
    int m = l+r>>1;
    if(p <= m){
        int val = query(T[k<<1|1],tm);
        return get(l, m, p, k<<1, tm) + val;
    }
    return get(m+1, r, p, k<<1|1, tm);
}
    
inline void F(int l, int r, int p, int k){
    if(l == r){
    dfs(T[k]);
    return;
    }
    int m = l+r>>1;
    if(p <= m) F(l, m, p, k<<1);
    else F(m+1, r, p, k<<1|1);
    if(p == r) dfs(T[k]);
}
    
vector<array<int, 3>> Q[M];
inline void solve(){
    // cout << sizeof(Node) << '\n';
    cin >> n >> q >> s;
    
    vector<int> val;
    vector<array<int, 4>> R, QQ; 
    int last = 1;
    s += '0';
    set<array<int, 3>> S;
    for(int i = 0; i <= n; ++i){
    if(s[i] == '0'){
        S.insert({last, i + 1, 0});
        last = i + 2;
    }
    }
    
    int qq = 0;
    
    for(int i = 0; i < q; ++i){
    string x; int a, b; cin >> x;
    if(x == "toggle"){
        cin >> a;
        --a;
        if(s[a] == '0'){
        s[a] = '1';
        ++a;
        auto it = S.lower_bound(array<int, 3>{a + 1, -1, -1});
        assert(it != S.begin());
        auto it2 = prev(it);
        auto x = *it, y = *it2;
        S.erase(it2);
        S.erase(S.find(x));
        S.insert({y[0], x[1], i + 1}); // check
        R.pb({x[0], x[1], x[2], i + 1});
        R.pb({y[0], y[1], y[2], i + 1});
        }else{
        s[a] = '0';
        ++a;
        auto it = S.lower_bound(array<int, 3>{a + 1, -1, -1});
        assert(it != S.begin());
        it = prev(it);
        auto x = *it;
        S.erase(it);
        S.insert({x[0], a, i + 1}); // check
        S.insert({a + 1, x[1], i + 1}); // check
        R.pb({x[0], x[1], x[2], i + 1});
        }
    }else{
        cin >> a >> b;
        QQ.pb({a, b, i + 1, qq});
        qq++;
    }
    }
    
    for(auto p: S){
      R.pb({p[0], p[1], p[2], q});
    }
    for(auto p: R) val.pb(p[0]), val.pb(p[1]);
    sort(all(val));
    val.erase(unique(all(val)), val.end());
    for(auto &p: R){
      p[0] = lower_bound(all(val), p[0]) - val.begin() + 1;
      p[1] = lower_bound(all(val), p[1]) - val.begin() + 1;
    }
    for(auto &p :QQ){
      p[0] = lower_bound(all(val), p[0]) - val.begin() + 1;
      p[1] = lower_bound(all(val), p[1]) - val.begin() + 1;
      Q[p[0]].pb({p[1], p[2], p[3]});
    }
    S.clear();
    
    sort(all(R));
    n = val.size() + 1;
    build(1, n, 1);
    int p = 0;
    // for(auto f: R){
    //   cout << f[0] << ' ' << f[1] << ' ' << f[2] << ' ' << f[3] << '\n';
    // }
    // en;en;
    
    for(int l = 1; l <= n; ++l){
      while(p < R.size() && R[p][0] == l){
              // cout << R[p][0] << ' ' << R[p][1] << ' ' << R[p][2] << ' ' << R[p][3] << '\n';
      
          int r = R[p][1], t1 = R[p][2], t2 = R[p][3];
          upd(1, n, r, 1, t1, t2);
          ++p;
      }
      for(auto query: Q[l]){
          int r = query[0], tm = query[1], idx = query[2];
              // cout << l << ' ' << r << '\n';
      
          ans[idx] = get(1, n, r, 1, tm);
          //  cout << ans[idx] << ' ';
          // en;en;
      }
      // if(l <= n/2)
      F(1, n, l, 1);
    }
    
    
    
    for(int i = 0; i < qq; ++i) cout << ans[i] << '\n';
}
    
    
int32_t main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int tt = 1, aa;
    // freopen("in.txt", "r", stdin);
    // freopen("out.txt", "w", stdout);
    while(tt--){
    solve();
    }
    cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
    return 0;
}

Compilation message

street_lamps.cpp: In constructor 'Node::Node(int, int)':
street_lamps.cpp:17:15: warning: 'Node::R' will be initialized after [-Wreorder]
   17 |     Node *L, *R;
      |               ^
street_lamps.cpp:16:12: warning:   'int Node::val' [-Wreorder]
   16 |     int Y, val;
      |            ^~~
street_lamps.cpp:19:5: warning:   when initialized here [-Wreorder]
   19 |     Node(int key, int val) : X(key), Y(rand()), L(nullptr), R(nullptr), val(val), sum(key * val), sum2(val) {}
      |     ^~~~
street_lamps.cpp:16:12: warning: 'Node::val' will be initialized after [-Wreorder]
   16 |     int Y, val;
      |            ^~~
street_lamps.cpp:15:12: warning:   'int Node::sum' [-Wreorder]
   15 |     int X, sum = 0, sum2 = 0;
      |            ^~~
street_lamps.cpp:19:5: warning:   when initialized here [-Wreorder]
   19 |     Node(int key, int val) : X(key), Y(rand()), L(nullptr), R(nullptr), val(val), sum(key * val), sum2(val) {}
      |     ^~~~
street_lamps.cpp: In function 'void build(int, int, int)':
street_lamps.cpp:101:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  101 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void upd(int, int, int, int, int, int)':
street_lamps.cpp:120:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  120 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'int get(int, int, int, int, int)':
street_lamps.cpp:130:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  130 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void F(int, int, int, int)':
street_lamps.cpp:143:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  143 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void solve()':
street_lamps.cpp:231:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 4> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  231 |       while(p < R.size() && R[p][0] == l){
      |             ~~^~~~~~~~~~
street_lamps.cpp: In function 'int32_t main()':
street_lamps.cpp:258:17: warning: unused variable 'aa' [-Wunused-variable]
  258 |     int tt = 1, aa;
      |                 ^~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10840 KB Output is correct
2 Correct 1 ms 10844 KB Output is correct
3 Correct 1 ms 10844 KB Output is correct
4 Correct 2 ms 10844 KB Output is correct
5 Correct 2 ms 10844 KB Output is correct
6 Correct 1 ms 11100 KB Output is correct
7 Correct 1 ms 10844 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1502 ms 65812 KB Output is correct
2 Correct 1836 ms 67532 KB Output is correct
3 Correct 2672 ms 69280 KB Output is correct
4 Correct 4622 ms 111520 KB Output is correct
5 Correct 2622 ms 79168 KB Output is correct
6 Execution timed out 5009 ms 118612 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11100 KB Output is correct
2 Correct 6 ms 11100 KB Output is correct
3 Correct 3 ms 11100 KB Output is correct
4 Correct 2 ms 10844 KB Output is correct
5 Execution timed out 5062 ms 137416 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 10840 KB Output is correct
2 Correct 4 ms 10968 KB Output is correct
3 Correct 5 ms 11100 KB Output is correct
4 Correct 7 ms 11256 KB Output is correct
5 Correct 1217 ms 70620 KB Output is correct
6 Correct 3046 ms 92704 KB Output is correct
7 Correct 4915 ms 118108 KB Output is correct
8 Execution timed out 5059 ms 137280 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10840 KB Output is correct
2 Correct 1 ms 10844 KB Output is correct
3 Correct 1 ms 10844 KB Output is correct
4 Correct 2 ms 10844 KB Output is correct
5 Correct 2 ms 10844 KB Output is correct
6 Correct 1 ms 11100 KB Output is correct
7 Correct 1 ms 10844 KB Output is correct
8 Correct 1502 ms 65812 KB Output is correct
9 Correct 1836 ms 67532 KB Output is correct
10 Correct 2672 ms 69280 KB Output is correct
11 Correct 4622 ms 111520 KB Output is correct
12 Correct 2622 ms 79168 KB Output is correct
13 Execution timed out 5009 ms 118612 KB Time limit exceeded
14 Halted 0 ms 0 KB -