Submission #483146

#	Time	Username	Problem	Language	Result	Execution time	Memory
483146		SirCovidThe19th	Lamps (JOI19_lamps)	C++17	100 / 100	68 ms	16056 KiB

lamp

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

#define MIN(a, b) a = min(a, b)

int n, dp[1000005][3]; string A, B;

int main(){
    cin >> n >> A >> B; A = " " + A; B = " " + B;
    memset(dp, 0x3f, sizeof(dp)); dp[0][0] = 0;
    for (int i = 1; i <= n; i++) for (int j : {0, 1, 2}){
        bool eq = (!j and A[i] == B[i]) or (j - 1 == B[i] - '0');
        int &DP = dp[i][j];
        MIN(DP, dp[i - 1][0] + (A[i - 1] == B[i - 1]) * !eq + (j == 1 or j == 2));
        MIN(DP, dp[i - 1][1] + (i == 1 or B[i - 1] == '0') * !eq + (j == 2));
        MIN(DP, dp[i - 1][2] + (i == 1 or B[i - 1] == '1') * !eq + (j == 1));
    }
    cout<<min({dp[n][0], dp[n][1], dp[n][2]})<<endl;
}

• Subtask 1: 6 / 6
• Subtask 2: 41 / 41
• Subtask 3: 4 / 4
• Subtask 4: 49 / 49