oj.uz

Submission #104593

# Submission time Handle Problem Language Result Execution time Memory
104593 2019-04-08T09:56:16 Z antimirage Lamps (JOI19_lamps) C++14
4 / 100
 119 ms 14708 KB 
# 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

lamp.cpp:34:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 84 ms 14068 KB Output is correct
8 Correct 119 ms 14488 KB Output is correct
9 Correct 85 ms 14516 KB Output is correct
10 Correct 85 ms 14524 KB Output is correct
11 Correct 88 ms 14524 KB Output is correct
12 Correct 87 ms 14708 KB Output is correct
13 Correct 78 ms 14528 KB Output is correct
14 Correct 83 ms 14492 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -