Submission #104593

#TimeUsernameProblemLanguageResultExecution timeMemory
104593antimirageLamps (JOI19_lamps)C++14
4 / 100
119 ms14708 KiB
# include <bits/stdc++.h>

using namespace std;

const int N = 1e6 + 5;

int n, pref[N][2], fl[N]; //dp[N][N][2]

string a, b;

//int calc (int l, int r, int type){
//
//      if (l > r) return 0;
//
//      if (dp[l][r][type] < 1e9) return dp[l][r][type];
//
//      int &ans = dp[l][r][type];
//
//      if (type == 0){
//
//            if ( a[l] == b[l] ){
//                  ans = calc(l + 1, r, type);
//                  return ans;
//            }
//            if ( a[r] == b[r] ){
//                  ans = calc(l, r - 1, type);
//                  return ans;
//            }
//
//            ans = min(ans, pref[r][0] );
//      }
//}

main(){

//      memset( dp, 0x3f3f3f3f, sizeof(dp) );

      cin >> n >> a >> b;

      a = ' ' + a;
      b = ' ' + b;

      for (int i = 1; i <= n; i++){

            if (i > 1 && a[i] != a[i - 1])
                  fl[i]++;

            fl[i] += fl[i - 1];

            if (b[i] != b[i - 1])
                  pref[i][ b[i] - 48 ] = 1;

            pref[i][0] += pref[i - 1][0];
            pref[i][1] += pref[i - 1][1];
      }
      assert(fl[n] == 0);

      cout << pref[n][1] << endl;

//      calc(1, n, 0);
//      calc(1, n, 1);
//
//      cout << min( dp[1][n][0], dp[1][n][1] ) << endl;
}

Compilation message (stderr)

lamp.cpp:34:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...