oj.uz

Submission #792606

# Submission time Handle Problem Language Result Execution time Memory
792606 2023-07-25T07:21:08 Z vjudge1 Lamps (JOI19_lamps) C++17
4 / 100
 26 ms 33984 KB 

// Author : حسن

#include <bits/stdc++.h>



using namespace std;

#define TL ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define rall(s) s.rbegin(),s.rend()
#define all(s) s.begin(),s.end()
#define pb push_back
#define fi first
#define se second
#define ll long long
#define ld long double
#define YES cout<<"YES\n"
#define Yes cout<<"Yes\n"
#define yes cout<<"yes\n"
#define NO cout<<"NO\n"
#define No cout<<"No\n"
#define no cout<<"no\n"


const int N = 1e6 + 9 , mod = 1e9 + 7;
ll c[N] = {} , d[N] = {} , a[N] = {}, b[N] = {} , dp[N][3];

void solve(){
    ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
    cin>>n;
    string a , b;
    cin>>a>>b;
    for(i = 0; i < n; i++){
        x = a[i] - '0';
        y = b[i] - '0';
        if(i == 0){
            if(a[i] == b[i]){
                dp[i][x] = 1;
                dp[i][1 - x]  = dp[i][2] = 2;
            }else {
                dp[i][1 - x] = 1;
                dp[i][x] = 2;
                dp[i][2] = 1;
            }
        }else {
            if(a[i] == b[i]){
                dp[i][x] = min(d[i - 1] + 1  , dp[i - 1][x]);
                dp[i][1 - x] = dp[i][2] = d[i - 1] + 2;
                dp[i][1 - x] = min(dp[i][1 - x] , dp[i - 1][1 - x] + 1 - (b[i - 1] == b[i]));
                dp[i][2] = min(dp[i][2] , dp[i - 1][2] + 1 - (a[i - 1] == b[i - 1]));
            }else {
                dp[i][1 - x] = 1 + d[i - 1];
                dp[i][x] = 2 + d[i - 1];
                dp[i][2] = 1 + d[i - 1];
                dp[i][1 - x] = min(dp[i][1 - x] , dp[i - 1][1 - x]);
                dp[i][x] = min(dp[i][x] , dp[i - 1][x] + 1 - (b[i - 1] == b[i]));
                dp[i][2] = min(dp[i][2] , dp[i - 1][2]);
            }
        }
        d[i] = min({dp[i][0] , dp[i][1] , dp[i][2]});
        if(i == 0 && a[i] == b[i])
            d[i] = 0;
        if(a[i] == b[i] && i)
            d[i] = min(d[i], d[i - 1]);
    }
    //cout<<dp[5][1]<<"\n";
    //cout<<dp[7][1]<<"\n";
    cout<<d[n - 1];
}

int main(){

     TL;
     /*
     #ifndef ONLINE_JUDGE
     freopen("input.txt", "r", stdin);
     freopen("output.txt", "w", stdout);
     #endif
     */
int t = 1;
//cin>>t;

while(t--)
     {
     solve();
     }

}
// Author : حسن

Compilation message

lamp.cpp: In function 'void solve()':
lamp.cpp:31:8: warning: unused variable 'q' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |        ^
lamp.cpp:31:16: warning: unused variable 'j' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                ^
lamp.cpp:31:20: warning: unused variable 'm' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                    ^
lamp.cpp:31:28: warning: unused variable 'z' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                            ^
lamp.cpp:31:32: warning: unused variable 's' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                ^
lamp.cpp:31:40: warning: unused variable 'f' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                        ^
lamp.cpp:31:43: warning: unused variable 'l' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                           ^
lamp.cpp:31:47: warning: unused variable 'r' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                               ^
lamp.cpp:31:51: warning: unused variable 'k' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                                   ^
lamp.cpp:31:59: warning: variable 'y' set but not used [-Wunused-but-set-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                                           ^
lamp.cpp:31:63: warning: unused variable 'mn' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                                               ^~
lamp.cpp:31:76: warning: unused variable 'mx' [-Wunused-variable]
   31 |     ll q , i , j , m , n , z , s  = 0, f, l , r , k , x , y , mn  = 1e18 , mx = 0;
      |                                                                            ^~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Incorrect 1 ms 212 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Incorrect 1 ms 212 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 26 ms 33900 KB Output is correct
8 Correct 25 ms 33984 KB Output is correct
9 Correct 24 ms 33948 KB Output is correct
10 Correct 25 ms 33948 KB Output is correct
11 Correct 24 ms 33924 KB Output is correct
12 Correct 25 ms 33872 KB Output is correct
13 Correct 25 ms 33908 KB Output is correct
14 Correct 25 ms 33944 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Incorrect 1 ms 212 KB Output isn't correct
14 Halted 0 ms 0 KB -