Submission #1244657

#	Time	Username	Problem	Language	Result	Execution time	Memory
1244657		nasjes	Dango Maker (JOI18_dango_maker)	C++20	33 / 100	265 ms	327680 KiB

dango_maker

#include <iostream>
#include <iomanip>
#include <vector>
#include <cmath>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
#include <stack>
#include <bitset>
#include <string>
#include <cstring>
#include <iterator>
#include <random>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
const ll dim = 5*1e3+7;
//const ll mod = 1e9 + 7;
const ll inf = 1e18 + 77;
#define endl "\n"
#define fi first
#define pb push_back
#define se second
#define vll vector<ll>

ll n, m;
ll a[dim][dim],up[dim][dim], rt[dim][dim], dp[dim][dim][3];
int main() {
    ll k, t, u0, v0;
    string s1;
    cin>>n>>m;
    ll ans=0;
    for(int i=1; i<=n; i++){
        cin>>s1;
        for(int j=1; j<=m; j++){
            if(s1[j-1]=='R')a[i][j]=1;
            else if(s1[j-1]=='G')a[i][j]=2;
            else a[i][j]=3;
            dp[i][j][0]=0;
            dp[i][j][1]=0;
            dp[i][j][2]=0;
        }

    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            if(a[i][j-1]==1 && a[i][j]==2 && a[i][j+1]==3 && j<m) {
                rt[i][j] = 1;
            }
            if(a[i-1][j]==1 && a[i][j]==2 && a[i+1][j]==3 && i<n){
                up[i][j]=1;
            }
        }
    }

    for(int s=2; s<=n+m; s++){
        for(int i=min<ll>(n, s-1); i>=1; i--){
            ll j=s-i;
            if(j==0 || j>m)continue;
            if(up[i][s-i])dp[i][s-i][2]=max(dp[i+1][s-(i+1)][2],dp[i+1][s-(i+1)][0])+1;
            if(rt[i][s-i])dp[i][s-i][1]=max(dp[i+1][s-(i+1)][1],dp[i+1][s-(i+1)][0])+1;
            dp[i][s-i][0]=max({dp[i+1][s-(i+1)][1],dp[i+1][s-(i+1)][0], dp[i+1][s-(i+1)][2]});
        }
        ll endj=min<ll> (m, s-1);
        ans+=max({dp[s-endj][endj][1], dp[s-endj][endj][2], dp[s-endj][endj][0]});
    }
    cout<<ans<<endl;





    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 0 / 67