Submission #1005533

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005533		AdamGS	Lamps (JOI19_lamps)	C++17	0 / 100	0 ms	348 KiB

lamp

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=1e6+7, INF=1e9+7;
int dp[LIM][3][2];
int main() {
        ios_base::sync_with_stdio(0); cin.tie(0);
        int n;
        string s, t;
        cin >> n >> s >> t;
        rep(i, 3) rep(j, 2) dp[0][i][j]=INF;
        dp[0][2][0]=1;
        rep(i, n) {
                rep(a, 3) rep(b, 2) dp[i+1][a][b]=INF;
                int x=0;
                if(s[i]!=t[i]) x=1;
                rep(a, 3) rep(b, 2) {
                        int c=dp[i][a][b];
                        if(x==1 && b==0) ++c;
                        dp[i+1][2][x]=min(dp[i+1][2][x], c);
                }
                x=0;
                if(t[i]!='0') x=1;
                rep(a, 3) rep(b, 2) {
                        int c=dp[i][a][b];
                        if(a!=0) ++c;
                        if(x==1 && b==0) ++c;
                        dp[i+1][0][x]=min(dp[i+1][0][x], c);
                }
                x=0;
                if(t[i]!='1') x=1;
                rep(a, 3) rep(b, 2) {
                        int c=dp[i][a][b];
                        if(a!=1) ++c;
                        if(x==1 && b==0) ++c;
                        dp[i+1][1][x]=min(dp[i+1][1][x], c);
                }
        }
        int ans=INF;
        rep(a, 3) rep(b, 2) ans=min(ans, dp[n][a][b]);
        cout << ans << '\n';
}

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