Submission #1067161

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067161		Braabebo10	Lamps (JOI19_lamps)	C++17	0 / 100	1027 ms	12204 KiB

lamp

#include <bits/stdc++.h>
#define ll long long
#define nl "\n"
#define all(v) v.begin(),v.end()
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
int main() {
    fast
    ll n;
    string a,b;
    cin>>n>>a>>b;
    ll dp[n+1]={};
    memset(dp,0x3f, sizeof(dp));
    dp[n]=0;
    for(ll i=n-1;i>=0;i--){
        bool op1=true,op2=true,op3=true,op4=true;
//        cout<<i<<nl;
        for(ll j=i;j<n;j++){
            if(b[j]=='0')op1=false;
            if(b[j]=='1')op2=false;
            if(a[j]==b[j])op3=false;
            else op4=false;
            if(op1||op2||op3)dp[i]=min(dp[i],dp[j+1]+1);
            if(op4)dp[i]=min(dp[i],dp[j+1]);
        }
//        cout<<dp[i]<<nl;
    }
    cout<<dp[0];
    return 0;
}

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