Submission #1068911

#TimeUsernameProblemLanguageResultExecution timeMemory
1068911epicci23Dango Maker (JOI18_dango_maker)C++17
100 / 100
134 ms124244 KiB
#include "bits/stdc++.h" #define all(v) v.begin() , v.end() using namespace std; const int INF = 1e9; const int N = 3005; int dp[N][N][2],ans[N][N]; void _(){ int n,m,res=0; cin >> n >> m; vector<string> v; v.push_back("$"); for(int i=0;i<n;i++){ string s;cin >> s; s="$"+s; v.push_back(s); } for(int i=1;i<=n;i++){ for(int j=m;j>=1;j--){ bool ok0=0,ok1=0; if(i+2<=n && v[i][j]=='R' && v[i+1][j]=='G' && v[i+2][j]=='W') ok0=1; if(j+2<=m && v[i][j]=='R' && v[i][j+1]=='G' && v[i][j+2]=='W') ok1=1; dp[i][j][0]=dp[i][j][1]=-INF; if(ok0){ dp[i][j][0]=1; if(i-1>=1 && j+1<=m) dp[i][j][0]=max(dp[i][j][0],ans[i-1][j+1]+1); } else dp[i][j][0]=-INF; if(ok1){ dp[i][j][1]=1; if(i-1>=1 && j+1<=m) dp[i][j][1]=max(dp[i][j][1],dp[i-1][j+1][1]+1); if(i-2>=1 && j+2<=m) dp[i][j][1]=max(dp[i][j][1],dp[i-2][j+2][1]+1); if(i-3>=1 && j+3<=m) dp[i][j][1]=max(dp[i][j][1],ans[i-3][j+3]+1); } else dp[i][j][1]=-INF; ans[i][j]=max({ans[i-1][j+1],dp[i][j][0],dp[i][j][1]}); } } for(int i=1;i<=n;i++) res+=ans[i][1]; for(int j=2;j<=m;j++) res+=ans[n][j]; cout << res << '\n'; } int32_t main(){ cin.tie(0); ios::sync_with_stdio(0); int tc=1;//cin >> tc; while(tc--) _(); return 0; }
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