Submission #1091585

#TimeUsernameProblemLanguageResultExecution timeMemory
1091585hahahahaNafta (COI15_nafta)C++17
34 / 100
17 ms5208 KiB
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#define i64 long long #define ld long double #define bit(n,i) ((n>>i)&1) #define pii pair<int,int> #define sz(x) (int)x.size() #define FOR(i,a,b) for(int i=a; i<=b; i++) #define FOD(i,a,b) for(int i=a; i>=b; i--) #define fi first #define se second #define pb push_back #define all(x) x.begin(),x.end() #define __sumairu__ signed main() #define die_hard_onimai_fan void seggs() #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);} #define brute(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".ans","w",stdout);} #define TIME (1.0*clock()/CLOCKS_PER_SEC) #define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #define ai(n) array<int,n> #define dbg(x) {cerr<<#x<<' '<<x<<endl;} #define dbgArr(arr,n) {cerr<<#arr;FOR(_i,1,n)cerr<<' '<<(arr)[_i];cerr<<endl;} template <typename T,typename U> ostream& operator<<(ostream &os,pair<T,U>p){ return os<<"{"<<p.fi<<", "<<p.se<<"}"; } mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count()); i64 Rand(i64 l,i64 r) { i64 ans=l+1ll*rd()*rd()%(r-l+1); assert(l<=ans&&ans<=r); return ans; } //const i64 base=1e9+7; //const i64 mod=(1ll<<53)+5; #define int long long #define debug 0 const int mod=1e9+7; //const int mod=998244353; const int inf=1e9; ///check the limits, dummy const int N=1e3+3; pii mv[]={{1,0},{0,1},{-1,0},{0,-1}}; int n,m; char a[N][N]; int c[N][N]; int dp[N],ndp[N]; bool vis[N][N]; int S,mn,mx; void dfs(int x,int y) { S+=(a[x][y]-'0'); mn=min(mn,y); mx=max(mx,y); vis[x][y]=1; FOR(i,0,3) { int u=x+mv[i].fi,v=y+mv[i].se; if(min(u,v)<1||u>n||v>m||a[u][v]=='.'||vis[u][v])continue; dfs(u,v); } } void solve(int l,int r,int ql,int qr) { if(l>r)return; int mid=(l+r)/2; pii best={-1,-1}; FOR(i,ql,min(mid,qr)) { best=max(best,pii(dp[i]+c[i][mid],i)); } ndp[mid]=best.fi; solve(l,mid-1,ql,best.se); solve(mid+1,r,best.se,qr); } die_hard_onimai_fan { cin>>n>>m; FOR(i,1,n)FOR(j,1,m)cin>>a[i][j]; FOR(i,1,n)FOR(j,1,m)if(a[i][j]!='.'&&!vis[i][j]) { S=0; mn=j,mx=j; dfs(i,j); FOR(k,mn,mx) { dp[k]+=S; c[1][k]+=S; c[mn][k]-=S; } } FOR(j,1,m) { FOR(i,1,j)c[i][j]+=c[i-1][j]; } cout<<*max_element(dp+1,dp+m+1)<<'\n'; FOR(i,2,m) { solve(1,m,1,m); swap(dp,ndp); cout<<*max_element(dp+1,dp+m+1)<<'\n'; } } __sumairu__ { FAST file(""); int tt=1;//cin>>tt; while(tt--)seggs(); cerr<<"\nTime elapsed: "<<TIME<<" s.\n"; } /** 5 5 .27.. 7.063 ....7 78... 8...2 */

Compilation message (stderr)

nafta.cpp: In function 'int main()':
nafta.cpp:61:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
nafta.cpp:170:5: note: in expansion of macro 'file'
  170 |     file("");
      |     ^~~~
nafta.cpp:61:83: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 | #define file(name) if(fopen(name".inp","r")){freopen(name".inp","r",stdin);freopen(name".out","w",stdout);}
      |                                                                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
nafta.cpp:170:5: note: in expansion of macro 'file'
  170 |     file("");
      |     ^~~~
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