oj.uz

Submission #1045361

# Submission time Handle Problem Language Result Execution time Memory
1045361 2024-08-05T21:11:41 Z mychecksedad Street Lamps (APIO19_street_lamps) C++17
40 / 100
 5000 ms 460228 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<array<int, 4>> R;
    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;
        Q[a].pb({b, i + 1, qq});
        qq++;
    }
    }
    
    for(auto p: S){
    R.pb({p[0], p[1], p[2], q});
    }
    S.clear();
    
    sort(all(R));
    build(1, n + 1, 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 + 1; ++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+1, 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 + 1, r, 1, tm);
        //  cout << ans[idx] << ' ';
        // en;en;
    }
    if(l <= n/2+5)
    F(1, n+1, 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:100:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  100 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void upd(int, int, int, int, int, int)':
street_lamps.cpp:119:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  119 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'int get(int, int, int, int, int)':
street_lamps.cpp:129:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  129 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void F(int, int, int, int)':
street_lamps.cpp:142:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  142 |     int m = l+r>>1;
      |             ~^~
street_lamps.cpp: In function 'void solve()':
street_lamps.cpp:217:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 4> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  217 |     while(p < R.size() && R[p][0] == l){
      |           ~~^~~~~~~~~~
street_lamps.cpp: In function 'int32_t main()':
street_lamps.cpp:244:17: warning: unused variable 'aa' [-Wunused-variable]
  244 |     int tt = 1, aa;
      |                 ^~

Subtask #1
20.0 / 20.0

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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 871 ms 87340 KB Output is correct
2 Correct 1070 ms 105396 KB Output is correct
3 Correct 1649 ms 150708 KB Output is correct
4 Correct 2920 ms 367048 KB Output is correct
5 Correct 1898 ms 248760 KB Output is correct
6 Correct 3477 ms 404388 KB Output is correct
7 Correct 1593 ms 304180 KB Output is correct
8 Correct 133 ms 57316 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11868 KB Output is correct
2 Correct 4 ms 11612 KB Output is correct
3 Correct 4 ms 11100 KB Output is correct
4 Correct 2 ms 10844 KB Output is correct
5 Execution timed out 5111 ms 457912 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 11100 KB Output is correct
2 Correct 3 ms 11356 KB Output is correct
3 Correct 4 ms 11612 KB Output is correct
4 Correct 5 ms 11864 KB Output is correct
5 Correct 921 ms 176564 KB Output is correct
6 Correct 2066 ms 288788 KB Output is correct
7 Correct 3438 ms 405244 KB Output is correct
8 Execution timed out 5073 ms 460228 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10840 KB Output is correct
2 Correct 1 ms 10844 KB Output is correct
3 Correct 2 ms 10840 KB Output is correct
4 Correct 1 ms 10844 KB Output is correct
5 Correct 2 ms 10840 KB Output is correct
6 Correct 1 ms 10844 KB Output is correct
7 Correct 2 ms 10844 KB Output is correct
8 Correct 871 ms 87340 KB Output is correct
9 Correct 1070 ms 105396 KB Output is correct
10 Correct 1649 ms 150708 KB Output is correct
11 Correct 2920 ms 367048 KB Output is correct
12 Correct 1898 ms 248760 KB Output is correct
13 Correct 3477 ms 404388 KB Output is correct
14 Correct 1593 ms 304180 KB Output is correct
15 Correct 133 ms 57316 KB Output is correct
16 Correct 6 ms 11868 KB Output is correct
17 Correct 4 ms 11612 KB Output is correct
18 Correct 4 ms 11100 KB Output is correct
19 Correct 2 ms 10844 KB Output is correct
20 Execution timed out 5111 ms 457912 KB Time limit exceeded
21 Halted 0 ms 0 KB -