oj.uz

Submission #623828

# Submission time Handle Problem Language Result Execution time Memory
623828 2022-08-06T15:17:20 Z Arnch Lamps (JOI19_lamps) C++17
4 / 100
 48 ms 35188 KB 
// oooo
/*
 har chi delet mikhad bebar ~
 gitar o ba khodet nabar! ~
 ;Amoo_Hasan;
*/

#include<bits/stdc++.h>
//#pragma GCC optimize("O3,no-stack-protector,unroll-loops")
//#pragma GCC target("avx2,fma")

using namespace std;

typedef long long ll;
typedef long double ld;

#define Sz(x) int((x).size())
#define All(x) (x).begin(), (x).end()
#define wtf(x) cout<<#x <<" : " <<x <<endl

constexpr ll inf = 1e18, N = 1e6 + 10, mod = 1e9 + 7, pr = 1000696969;

ll dp[N][3];
int A[N], B[N];

int main() {
    ios :: sync_with_stdio(0), cin.tie(0);

	int n; cin >>n;
	string a, b; cin >>a >>b;

	for(int i = 0; i < n; i++) {
		A[i + 1] = (a[i] - '0') + 1;
		B[i + 1] = (b[i] - '0') + 1;
	}

	memset(dp, 63, sizeof(dp));
	dp[0][0] = 0;

	for(int i = 1; i <= n; i++) {
		for(int j = 0; j < 3; j++) {
			for(int k = 0; k < 3; k++) {
				if(j != 0 && j == k) {
					if(j == B[i - 1] && j != B[i]) {
						dp[i][j] = min(dp[i][j], dp[i - 1][k] + 2);
						continue;
					}
					dp[i][j] = min(dp[i][j], dp[i - 1][k]);
					continue;
				}
				if(j == 0) {
					if(k == 0) {
						if(A[i] != B[i] && A[i - 1] == B[i - 1]) {
							dp[i][j] = min(dp[i][j], dp[i - 1][k] + 2);
							continue;
						}
						dp[i][j] = min(dp[i][j], dp[i - 1][k]);
						continue;
					}
					if(A[i] != B[i] && B[i - 1] == k) {
						dp[i][j] = min(dp[i][j], dp[i - 1][k] + 2);
						continue;
					}
					dp[i][j] = min(dp[i][j], dp[i - 1][k]);
				}
				if(k == B[i - 1] && j != B[i]) {
					dp[i][j] = min(dp[i][j], dp[i - 1][k] + 4);
					continue;
				}
				dp[i][j] = min(dp[i][j], dp[i - 1][k] + 2);
				continue;
			}
		}
	}

	/*for(int i = 1; i <= n; i++) {
		for(int j = 0; j < 3; j++) {
			cout<<"^^" <<i <<" " <<j <<" " <<dp[i][j] / 2 <<endl;
		}
	}*/

	ll ans = inf;
	for(int i = 0; i < 3; i++) ans = min(ans, dp[n][i]);

	cout<<ans / 2;

    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 10 ms 23764 KB Output is correct
4 Correct 10 ms 23708 KB Output is correct
5 Correct 10 ms 23740 KB Output is correct
6 Correct 9 ms 23748 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23776 KB Output is correct
10 Correct 12 ms 23736 KB Output is correct
11 Correct 10 ms 23764 KB Output is correct
12 Incorrect 10 ms 23764 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 10 ms 23764 KB Output is correct
4 Correct 10 ms 23708 KB Output is correct
5 Correct 10 ms 23740 KB Output is correct
6 Correct 9 ms 23748 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23776 KB Output is correct
10 Correct 12 ms 23736 KB Output is correct
11 Correct 10 ms 23764 KB Output is correct
12 Incorrect 10 ms 23764 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23768 KB Output is correct
3 Correct 10 ms 23756 KB Output is correct
4 Correct 10 ms 23764 KB Output is correct
5 Correct 10 ms 23756 KB Output is correct
6 Correct 10 ms 23764 KB Output is correct
7 Correct 43 ms 34624 KB Output is correct
8 Correct 44 ms 35124 KB Output is correct
9 Correct 44 ms 35188 KB Output is correct
10 Correct 44 ms 35104 KB Output is correct
11 Correct 46 ms 35012 KB Output is correct
12 Correct 48 ms 35128 KB Output is correct
13 Correct 47 ms 35028 KB Output is correct
14 Correct 43 ms 35112 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 10 ms 23764 KB Output is correct
4 Correct 10 ms 23708 KB Output is correct
5 Correct 10 ms 23740 KB Output is correct
6 Correct 9 ms 23748 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23776 KB Output is correct
10 Correct 12 ms 23736 KB Output is correct
11 Correct 10 ms 23764 KB Output is correct
12 Incorrect 10 ms 23764 KB Output isn't correct
13 Halted 0 ms 0 KB -