oj.uz

Submission #376140

# Submission time Handle Problem Language Result Execution time Memory
376140 2021-03-11T01:52:40 Z daniel920712 Lamps (JOI19_lamps) C++14
0 / 100
 1000 ms 81772 KB 
#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;
char a[1000005];
char b[1000005];
bool have[1000005]={0};
int DP[1000005],N;
int F(int here)
{
    int i,tt;
    if(here==N) return 0;
    if(have[here]) return DP[here];
    have[here]=1;
    if(a[here]==b[here]) DP[here]=F(here+1);
    else DP[here]=F(here+1)+1;
    tt=0;
    for(i=here;i<N;i++)
    {
        if(b[i]=='1'&&(i==here||b[i-1]=='0')) tt++;
        DP[here]=min(DP[here],F(i+1)+tt+1);
    }
    tt=0;
    for(i=here;i<N;i++)
    {
        if(b[i]=='0'&&(i==here||b[i-1]=='1')) tt++;
        DP[here]=min(DP[here],F(i+1)+tt+1);
    }
    tt=0;
    for(i=here;i<N;i++)
    {
        if(a[i]==b[i]&&(i==here||a[i-1]!=b[i-1])) tt++;
        DP[here]=min(DP[here],F(i+1)+tt+1);

    }
    return DP[here];

}
int main()
{
    int M,ans=0,i;
    scanf("%d",&N);
    scanf("%s %s",a,b);

    printf("%d\n",F(0));
    return 0;
}

Compilation message

lamp.cpp: In function 'int main()':
lamp.cpp:42:9: warning: unused variable 'M' [-Wunused-variable]
   42 |     int M,ans=0,i;
      |         ^
lamp.cpp:42:11: warning: unused variable 'ans' [-Wunused-variable]
   42 |     int M,ans=0,i;
      |           ^~~
lamp.cpp:42:17: warning: unused variable 'i' [-Wunused-variable]
   42 |     int M,ans=0,i;
      |                 ^
lamp.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |     scanf("%d",&N);
      |     ~~~~~^~~~~~~~~
lamp.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |     scanf("%s %s",a,b);
      |     ~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Execution timed out 1091 ms 81772 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -