Submission #918916

#	Time	Username	Problem	Language	Result	Execution time	Memory
918916		mychecksedad	Deda (COCI17_deda)	C++17	140 / 140	168 ms	50512 KiB

deda

/* 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'
const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30;

int n, q, T[N], idx1[N], idx2[N];
vector<int> v[N];
void build(int l, int r, int k){
  // cout << k << ' ' << l << ' ' << r << '\n';
  if(l == r){
    idx1[k] = l, idx2[k] = r;
    T[k] = MOD;
    return;
  }
  int m = l+r>>1;
  build(l, m, k<<1);
  build(m+1, r, k<<1|1);
  T[k] = MOD;
  idx1[k] = l, idx2[k] = r;
}
void upd(int l, int r, int p, int k, int val){
  if(l == r){
    T[k] = val;
    return;
  }
  int m = l+r>>1;
  if(p <= m) upd(l, m, p, k<<1, val);
  else upd(m+1, r, p, k<<1|1, val);
  T[k] = min(T[k<<1], T[k<<1|1]);
}
int get2(int l, int r, int k, int val){
  if(l == r) return l;
  int m = l+r>>1;
  if(T[k<<1] <= val) return get2(l, m, k<<1, val);
  return get2(m+1, r, k<<1|1, val);
}
int get(int p, int val){
  for(auto &idx: v[p]){
    // cout << idx
    if(T[idx] <= val){
      return get2(idx1[idx], idx2[idx], idx, val);
    }
  }
  return -1;
}
void s(int l, int r, int p, int k){
  if(l == r){
    v[p].pb(k);
    return;
  }
  int m = l+r>>1;
  if(p <= m){
    v[p].pb(k<<1|1);
    s(l, m, p, k<<1);
  }else s(m+1, r, p, k<<1|1);
}
void solve(){
  cin >> n >> q;
  build(1, n, 1);
  for(int i = 1; i <= n; ++i){
    s(1, n, i, 1);
    // cout << i << ":\n";
    // for(int j : v[i]) cout << j << ' ';
    // en;
    sort(all(v[i]), [&](const int &x, const int &y){
      return idx1[x] < idx1[y];
    });
  }
  for(int i = 0; i < q; ++i){
    char c; cin >> c;
    if(c == 'M'){
      int X, A; cin >> X >> A;
      upd(1, n, A, 1, X);
    }else{
      int B, Y; cin >> Y >> B;
      cout << get(B, Y) << '\n';
    }
  }
}



int 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();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

Compilation message (stderr)

deda.cpp: In function 'void build(int, int, int)':
deda.cpp:21:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   21 |   int m = l+r>>1;
      |           ~^~
deda.cpp: In function 'void upd(int, int, int, int, int)':
deda.cpp:32:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   32 |   int m = l+r>>1;
      |           ~^~
deda.cpp: In function 'int get2(int, int, int, int)':
deda.cpp:39:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |   int m = l+r>>1;
      |           ~^~
deda.cpp: In function 'void s(int, int, int, int)':
deda.cpp:57:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   57 |   int m = l+r>>1;
      |           ~^~
deda.cpp: In function 'int main()':
deda.cpp:91:15: warning: unused variable 'aa' [-Wunused-variable]
   91 |   int tt = 1, aa;
      |               ^~

• Subtask 1: 140 / 140