oj.uz

Submission #911060

# Submission time Handle Problem Language Result Execution time Memory
911060 2024-01-18T12:12:21 Z 8pete8 Nafta (COI15_nafta) C++17
34 / 100
 1000 ms 70992 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<float.h>
#include<limits.h>
#include <cassert>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric> //gcd(a,b)
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,ll>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
using namespace std;
#define int long long
#define double long double
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-loops")
const int mod=1e9+7,mxn=3e5,lg=30,inf=1e18,minf=-1e9,Mxn=100000;
int n,m;
char grid[2002][2002];
int dp[2002][2002],val[2002],cost[2002][2002],on[2002];
bool vis[2002][2002];
int u[4]={0,0,1,-1},r[4]={1,-1,0,0};
int ans=0,sum=0;
int mn,mx;
void dfs(int cx,int cy){
    on[cy]=1;
    sum+=(grid[cx][cy]-'0');
    mn=min(mn,cy);
    mx=max(mx,cy);
    vis[cx][cy]=true;
    for(int i=0;i<4;i++){
        int nx=cx+u[i],ny=cy+r[i];
        if(nx<0||ny<0||nx>=n||ny>=m)continue;
        if(vis[nx][ny]||grid[nx][ny]=='.')continue;
        dfs(nx,ny);
    }
}
void solve(int l,int r,int opl,int opr,int k){
    if(l>r)return;
    int mid=l+(r-l)/2;
    int opt=mid;
    for(int j=0;j<mid;j++)if(dp[opt][k-1]-cost[opt][mid]<dp[j][k-1]-cost[j][mid])opt=j;
    dp[mid][k]=dp[opt][k-1]-cost[opt][mid]+val[mid];
    if(dp[mid][k]<val[mid])dp[mid][k]=val[mid],opt=mid;
    solve(l,mid-1,opl,opt,k);
    solve(mid+1,r,opt,opr,k);
}
int32_t main(){
    fastio
    int sub=0;
    cin>>n>>m;
    for(int i=0;i<n;i++)for(int j=0;j<m;j++)cin>>grid[i][j];
    for(int i=0;i<n;i++)for(int j=0;j<m;j++){
        if(vis[i][j]||grid[i][j]=='.')continue;
        sum=0;
        mn=inf,mx=minf;
        dfs(i,j);
        for(int j=mn;j<=mx;j++)val[j]+=sum;
        cost[mn][mx]+=sum;
    }
    for(int i=0;i<m;i++)for(int j=0;j<m;j++)if(i)cost[i][j]+=cost[i-1][j];
    for(int i=0;i<m;i++)for(int j=m-1;j>=0;j--)cost[i][j]+=cost[i][j+1];
    for(int i=1;i<=m;i++){
        for(int j=0;j<m;j++){
            dp[j][i]=val[j];
            if(j)dp[j][i]=max(dp[j][i],dp[j-1][i]);
            for(int l=0;l<j;l++)dp[j][i]=max(dp[j][i],dp[l][i-1]-cost[l][j]+val[j]);
        }
    }
    for(int i=1;i<=m;i++)cout<<dp[m-1][i]<<'\n';
    /*
    for(int i=1;i<=m;i++)solve(0,m-1,0,m-1,i);
    for(int i=1;i<=m;i++){
        int ans=0;
        for(int j=0;j<m;j++)ans=max(ans,dp[j][i]);
        cout<<ans<<'\n';
    }
    */
}

Compilation message

nafta.cpp: In function 'int32_t main()':
nafta.cpp:70:9: warning: unused variable 'sub' [-Wunused-variable]
   70 |     int sub=0;
      |         ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 6868 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6744 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 6868 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6744 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct
7 Correct 21 ms 15960 KB Output is correct
8 Correct 21 ms 15956 KB Output is correct
9 Correct 21 ms 18600 KB Output is correct
10 Correct 19 ms 15960 KB Output is correct
11 Correct 19 ms 15964 KB Output is correct
12 Correct 18 ms 14172 KB Output is correct

Subtask #3
0 / 66.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 6868 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6744 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct
7 Correct 21 ms 15960 KB Output is correct
8 Correct 21 ms 15956 KB Output is correct
9 Correct 21 ms 18600 KB Output is correct
10 Correct 19 ms 15960 KB Output is correct
11 Correct 19 ms 15964 KB Output is correct
12 Correct 18 ms 14172 KB Output is correct
13 Execution timed out 1030 ms 70992 KB Time limit exceeded
14 Halted 0 ms 0 KB -