Submission #698985

#	Time	Username	Problem	Language	Result	Execution time	Memory
698985		Abrar_Al_Samit	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	5089 ms	9704 KiB

street_lamps

#include<bits/stdc++.h>
using namespace std;

void PlayGround() {
  int n, q;
  cin>>n>>q;

  vector<int>state(n);
  for(int i=0; i<n; ++i) {
    char c;
    cin>>c;
    state[i] = c-'0';
  }
  vector<int>op;

  for(int i=0; i<q; ++i) {
    string type;
    cin>>type;
    if(type=="toggle") {
      int j;
      cin>>j;
      op.push_back(j-1);
    } else {
      op.push_back(-1);

      int a, b;
      cin>>a>>b;
      --a, --b;
      int len = b-a;

      int cnt = 0;
      for(int j=a; j<b; ++j) {
        cnt += state[j];
      }
      int ans = 0;

      vector<int>temp = state;
      for(int j=0; j<=i; ++j) {
        if(op[j]==-1) ans += len==cnt;
        else {
          ans += len==cnt;
          temp[op[j]] ^= 1;
          if(op[j]>=a && op[j]<b) cnt += temp[op[j]]?1:-1;
        }
      }
      cout<<ans<<'\n';
    }
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20