oj.uz

Submission #549532

# Submission time Handle Problem Language Result Execution time Memory
549532 2022-04-16T02:37:19 Z krit3379 The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 2894 ms 71060 KB 
#include<bits/stdc++.h>
using namespace std;
#define N 2005


int a[N][N],b[N][N],ans=2e9;

bool valid(int n,int m,int val,int &ans){
    int i,j,mi[2],ma[2];
    bitset<N> dp[N];
    mi[0]=mi[1]=1e9;
    ma[0]=ma[1]=0;
    for(i=0;i<=m;i++)dp[n+1][i]=true;
    for(i=0;i<=n;i++)dp[i]=1;
    for(i=n;i>0;i--)for(j=1;a[i][j]<=val&&dp[i+1][j]&&dp[i][j-1];j++)dp[i][j]=true;
    if(dp[1][m])return true;
    if(!dp[n][1])return false;
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            mi[dp[i][j]]=min(mi[dp[i][j]],a[i][j]);
            ma[dp[i][j]]=max(ma[dp[i][j]],a[i][j]);
        }
    }
    ans=min(ans,max(ma[0]-mi[0],ma[1]-mi[1]));
    if(mi[1]>=mi[0])return false;
    return ma[1]-mi[1]>ma[0]-mi[0];
}

int sol(int n,int m){
    int l=0,r=1e9,mid,ans=1e9;
    while(l<=r){
        mid=(l+r)/2;
        if(valid(n,m,mid,ans))r=mid-1;
        else l=mid+1;
    }
    return ans;
}

int main(){
    int n,m,i,j,k,mi=2e9,ma=0;
    scanf("%d %d",&n,&m);
    for(i=1;i<=n;i++)for(j=1;j<=m;j++)scanf("%d",&a[i][j]);
    ans=min(ans,sol(n,m));
    for(i=1;i<=n;i++)for(j=1;j<=m;j++)b[i][j]=a[i][j];
    for(i=1;i<=m;i++)for(j=1;j<=n;j++)a[i][j]=b[n-j+1][i];
    ans=min(ans,sol(m,n));
    for(i=1;i<=m;i++)for(j=1;j<=n;j++)b[i][j]=a[i][j];
    for(i=1;i<=n;i++)for(j=1;j<=m;j++)a[i][j]=b[m-j+1][i];
    ans=min(ans,sol(n,m));
    for(i=1;i<=n;i++)for(j=1;j<=m;j++)b[i][j]=a[i][j];
    for(i=1;i<=m;i++)for(j=1;j<=n;j++)a[i][j]=b[n-j+1][i];
    ans=min(ans,sol(m,n));
    printf("%d",ans);
    return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:40:17: warning: unused variable 'k' [-Wunused-variable]
   40 |     int n,m,i,j,k,mi=2e9,ma=0;
      |                 ^
joioi.cpp:40:19: warning: unused variable 'mi' [-Wunused-variable]
   40 |     int n,m,i,j,k,mi=2e9,ma=0;
      |                   ^~
joioi.cpp:40:26: warning: unused variable 'ma' [-Wunused-variable]
   40 |     int n,m,i,j,k,mi=2e9,ma=0;
      |                          ^~
joioi.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
joioi.cpp:42:44: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     for(i=1;i<=n;i++)for(j=1;j<=m;j++)scanf("%d",&a[i][j]);
      |                                       ~~~~~^~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 852 KB Output is correct
2 Correct 2 ms 820 KB Output is correct
3 Correct 2 ms 824 KB Output is correct
4 Correct 3 ms 892 KB Output is correct
5 Correct 3 ms 852 KB Output is correct
6 Correct 3 ms 852 KB Output is correct
7 Correct 3 ms 852 KB Output is correct
8 Correct 3 ms 908 KB Output is correct
9 Correct 3 ms 824 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 3 ms 852 KB Output is correct
12 Correct 3 ms 832 KB Output is correct
13 Correct 2 ms 852 KB Output is correct
14 Correct 3 ms 828 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 852 KB Output is correct
2 Correct 2 ms 820 KB Output is correct
3 Correct 2 ms 824 KB Output is correct
4 Correct 3 ms 892 KB Output is correct
5 Correct 3 ms 852 KB Output is correct
6 Correct 3 ms 852 KB Output is correct
7 Correct 3 ms 852 KB Output is correct
8 Correct 3 ms 908 KB Output is correct
9 Correct 3 ms 824 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 3 ms 852 KB Output is correct
12 Correct 3 ms 832 KB Output is correct
13 Correct 2 ms 852 KB Output is correct
14 Correct 3 ms 828 KB Output is correct
15 Correct 4 ms 2388 KB Output is correct
16 Correct 17 ms 2772 KB Output is correct
17 Correct 24 ms 2912 KB Output is correct
18 Correct 26 ms 3008 KB Output is correct
19 Correct 31 ms 2952 KB Output is correct
20 Correct 25 ms 2940 KB Output is correct
21 Correct 32 ms 3108 KB Output is correct
22 Correct 31 ms 3156 KB Output is correct
23 Correct 32 ms 3020 KB Output is correct
24 Correct 26 ms 3028 KB Output is correct
25 Correct 33 ms 3108 KB Output is correct
26 Correct 34 ms 3020 KB Output is correct
27 Correct 35 ms 3104 KB Output is correct
28 Correct 32 ms 3028 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 852 KB Output is correct
2 Correct 2 ms 820 KB Output is correct
3 Correct 2 ms 824 KB Output is correct
4 Correct 3 ms 892 KB Output is correct
5 Correct 3 ms 852 KB Output is correct
6 Correct 3 ms 852 KB Output is correct
7 Correct 3 ms 852 KB Output is correct
8 Correct 3 ms 908 KB Output is correct
9 Correct 3 ms 824 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 3 ms 852 KB Output is correct
12 Correct 3 ms 832 KB Output is correct
13 Correct 2 ms 852 KB Output is correct
14 Correct 3 ms 828 KB Output is correct
15 Correct 4 ms 2388 KB Output is correct
16 Correct 17 ms 2772 KB Output is correct
17 Correct 24 ms 2912 KB Output is correct
18 Correct 26 ms 3008 KB Output is correct
19 Correct 31 ms 2952 KB Output is correct
20 Correct 25 ms 2940 KB Output is correct
21 Correct 32 ms 3108 KB Output is correct
22 Correct 31 ms 3156 KB Output is correct
23 Correct 32 ms 3020 KB Output is correct
24 Correct 26 ms 3028 KB Output is correct
25 Correct 33 ms 3108 KB Output is correct
26 Correct 34 ms 3020 KB Output is correct
27 Correct 35 ms 3104 KB Output is correct
28 Correct 32 ms 3028 KB Output is correct
29 Correct 1970 ms 54300 KB Output is correct
30 Correct 1869 ms 53700 KB Output is correct
31 Correct 1988 ms 55320 KB Output is correct
32 Correct 1965 ms 55288 KB Output is correct
33 Correct 1845 ms 52148 KB Output is correct
34 Correct 2027 ms 55400 KB Output is correct
35 Correct 2894 ms 70948 KB Output is correct
36 Correct 2527 ms 65864 KB Output is correct
37 Correct 2857 ms 71060 KB Output is correct