Submission #937546

#	Time	Username	Problem	Language	Result	Execution time	Memory
937546		WonderfulWhale	Lamps (JOI19_lamps)	C++17	4 / 100	195 ms	67124 KiB

lamp

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

#define int int64_t
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

int dp[1000009][8];

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);


	int n;
	cin >> n;
	for(int i=0;i<=n;i++) {
		for(int j=0;j<8;j++) {
			dp[i][j] = 1e9;
		}
	}
	dp[0][0] = 0;
	string A, B;
	cin >> A >> B;
	for(int i=1;i<=n;i++) {
		for(int j=0;j<8;j++) {
			for(int k=0;k<8;k++) {
				bool a = k&1;
				bool b = k&2;
				bool c = k&4;
				if(a&&b) continue;
				int New = A[i-1]-'0';
				if(c) New = 1-New;
				if(a) New = 1;
				if(b) New = 0;
				if(New!=B[i-1]-'0') continue;
				bool ap = a&(!(j&1));
				bool bp = b&(!(j&2));
				bool cp = c&(!(j&4));
				dp[i][k] = min(dp[i][k], dp[i-1][j]+ap+bp+cp);
			}
		}
	}
	int ans = 1e9;
	for(int i=0;i<8;i++)
		ans = min(ans, dp[n][i]);
cout << ans << "\n";
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 4 / 4
• Subtask 4: 0 / 49