제출 #838249

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
838249		manizare	가로등 (APIO19_street_lamps)	C++14	20 / 100	420 ms	9904 KiB

street_lamps

#include <bits/stdc++.h> 

#define pb push_back 
#define F first 
#define S second 
#define all(a) a.begin(),a.end() 
#define pii pair<int,int>
using namespace std ;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxn = 1000 + 10 ,  inf = 1e9+10  ;
int pre[maxn][maxn]  ; 
signed main(){
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  int n , q;
  cin >>n >> q;
  string s;
  cin >> s; 
  s=  "0" + s;
  for(int j = 1; j  <= n ; j++){
    pre[0][j] = pre[0][j-1] + (s[j] == '0'); 
  }
  for(int i = 1; i <= q ; i++){
    string a ;
    cin >> a; 
    if(a[0] == 't'){
        int x;
        cin >> x; 
        if(s[x] == '0')s[x] = '1' ;
        else s[x] = '0' ; 
    }
    for(int j = 1; j <= n;  j++){
        pre[i][j] = pre[i][j-1] + (s[j] == '0') ;  
    }
    if(a[0] == 'q'){
        int r , l; 
        cin >> l >> r ; 
        r--;
        int ans = 0 ;
        for(int j = 0;  j < i ;j++){
            if(pre[j][r] == pre[j][l-1]){
                ans ++ ;
            }
        }
        cout <<ans << "\n"; 
    }
  }
}
/*
 5 7
11011
query 1 2
query 1 2
query 1 6
query 3 4
toggle 3
query 3 4
query 1 6

*/

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