Submission #151107

#TimeUsernameProblemLanguageResultExecution timeMemory
151107shashwatchandraLamps (JOI19_lamps)C++17
0 / 100
26 ms4772 KiB
/*input 8 00000000 10101011 */ #include<bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace std; using namespace __gnu_pbds; #define int long long #define double long double #define f first #define s second #define mp make_pair #define pb push_back #define RE(i,n) for (int i = 1; i <= n; i++) #define RED(i,n) for (int i = n; i > 0; i--) #define REPS(i,n) for(int i = 1; (i*i) <= n; i++) #define REP(i,n) for (int i = 0; i < (int)n; i++) #define FOR(i,a,b) for (int i = a; i < b; i++) #define REPD(i,n) for (int i = n-1; i >= 0; i--) #define FORD(i,a,b) for (int i = a; i >= b; i--) #define all(v) v.begin(),v.end() #define pii pair<int,int> #define vi vector<int> #define vvi vector<vi> #define print(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout << *it << " "; cout << endl; #define debug(x) cout << x << endl; #define debug2(x,y) cout << x << " " << y << endl; #define debug3(x,y,z) cout << x << " " << y << " " << z << endl; typedef tree< int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; const int INF = 1e18+1; const int MOD = 1e9+7; const double PI = 3.14159265358979323846264338; int raise(int a,int n,int m = MOD){ if(n == 0)return 1; if(n == 1)return a; int x = 1; x *= raise(a,n/2,m); x %= m; x *= x; x %= m; if(n%2)x*= a; x %= m; return x; } int floor1(int n,int k){ if(n%k == 0 || n >= 0)return n/k; return (n/k)-1; } int ceil1(int n,int k){ return floor1(n+k-1,k); } const int N = 2001; int dp[N]; string s,t; int n; void solve(){ cin >> n >> s >> t; dp[0] = 0; RE(i,n){ int cur = i; dp[i] = INF; while(cur >= 1 and t[cur-1] == t[i-1] ){ dp[i] = min(dp[i],dp[cur-1]+1); cur--; } dp[i] = min(dp[i],dp[cur]+1); if(s[i-1] == t[i-1])dp[i] = min(dp[i-1],dp[i]); cur = i; while(cur >= 1 and t[cur-1] != s[cur-1]){ dp[i] = min(dp[i],dp[cur-1]+1); cur--; } dp[i] = min(dp[i],dp[cur]+1); } cout<< dp[n]; } signed main(){ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); //freopen(".in","r",stdin);freopen(".out","w",stdout); int t = 1; //cin >> t; while(t--){ solve(); } return 0; }
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