Submission #932916

#	Time	Username	Problem	Language	Result	Execution time	Memory
932916		AdamGS	Sweeping (JOI20_sweeping)	C++17	1 / 100	18063 ms	223540 KiB

sweeping

#include<bits/stdc++.h>
using namespace std;
typedef long double ld;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=5e5+7;
int pocz[3*LIM], czy[3*LIM], n, m, N=1;
pair<int,int>T[LIM], wynik[2*LIM];
vector<pair<int,int>>P;
vector<int>wierz[8*LIM];
void upd(int l, int r, int x) {
  if(l>r) return;
  l+=N; r+=N;
  wierz[l].pb(x);
  if(l!=r) wierz[r].pb(x);
  while(l/2!=r/2) {
    if(l%2==0) wierz[l+1].pb(x);
    if(r%2==1) wierz[r-1].pb(x);
    l/=2; r/=2;
  }
}
void solve(int v, int l, int r) {
  if(l<r) {
    int mid=(l+r)/2;
    solve(2*v, l, mid);
    solve(2*v+1, mid+1, r);
  }
  for(auto i : wierz[v]) czy[i]=1;
  while(l<=r) {
    if(P[l].st==2) {
      rep(i, m) if(czy[i] && T[i].nd<=P[l].nd) T[i].st=max(T[i].st, n-P[l].nd);
    } else if(P[l].st==3) {
      rep(i, m) if(czy[i] && T[i].st<=P[l].nd) T[i].nd=max(T[i].nd, n-P[l].nd);
    } else if(czy[P[l].nd]) wynik[l]=T[P[l].nd];
    ++l;
  }
  for(auto i : wierz[v]) czy[i]=0;
}
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int q;
  cin >> n >> m >> q;
  rep(i, m) cin >> T[i].st >> T[i].nd;
  rep(i, q) {
    int t;
    cin >> t;
    if(t==4) {
      cin >> T[m].st >> T[m].nd;
      pocz[m]=P.size();
      ++m;
    } else {
      int x;
      cin >> x;
      if(t==1) --x;
      P.pb({t, x});
    }
  }
  while(N<P.size()) N*=2;
  while(P.size()<N) P.pb({2, 0});
  rep(i, P.size()) wynik[i]={-1, -1};
  rep(i, m) upd(pocz[i], P.size()-1, i);
  solve(1, 0, N-1);
  rep(i, P.size()) if(wynik[i].st!=-1) cout << wynik[i].st << " " << wynik[i].nd << '\n';
}

Compilation message (stderr)

sweeping.cpp: In function 'int main()':
sweeping.cpp:62:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   while(N<P.size()) N*=2;
      |         ~^~~~~~~~~
sweeping.cpp:63:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   63 |   while(P.size()<N) P.pb({2, 0});
      |         ~~~~~~~~^~
sweeping.cpp:5:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define rep(a, b) for(int a = 0; a < (b); ++a)
      |                                    ^
sweeping.cpp:64:3: note: in expansion of macro 'rep'
   64 |   rep(i, P.size()) wynik[i]={-1, -1};
      |   ^~~
sweeping.cpp:5:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define rep(a, b) for(int a = 0; a < (b); ++a)
      |                                    ^
sweeping.cpp:67:3: note: in expansion of macro 'rep'
   67 |   rep(i, P.size()) if(wynik[i].st!=-1) cout << wynik[i].st << " " << wynik[i].nd << '\n';
      |   ^~~

• Subtask 1: 1 / 1
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25