Submission #251489

#TimeUsernameProblemLanguageResultExecution timeMemory
251489leakedRetro (COCI17_retro)C++14
40 / 100
162 ms102904 KiB
#include<bits/stdc++.h> using namespace std; #include<ext/pb_ds/assoc_container.hpp> #include<ext/pb_ds/tree_policy.hpp> // // #pragma GCC optimize("unroll-loops") // #pragma GCC optimize("Ofast") // #pragma GCC optimize("-O3") // #pragma GCC optimize("no-stack-protector") // #pragma GCC optimize("fast-math") //#define LOCAL #define sim template < class c #define ris return * this #define dor > debug & operator << #define eni(x) sim > typename \ enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) { sim > struct rge { c b, e; }; sim > rge<c> range(c i, c j) { return rge<c>{i, j}; } sim > auto dud(c* x) -> decltype(cerr << *x, 0); sim > char dud(...); struct debug { #ifndef LOCAL ~debug() { cerr << endl; } eni(!=) cerr << boolalpha << i; ris; } eni(==) ris << range(begin(i), end(i)); } sim, class b dor(pair < b, c > d) { ris << "(" << d.first << ", " << d.second << ")"; } sim dor(rge<c> d) { *this << "["; for (auto it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; ris << "]"; } #else sim dor(const c&) { ris; } #endif }; #define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] " #define fi first #define f first #define se second #define s second #define vi_a vector<int>a; #define p_b push_back ////////////////////////////////???????????????CHECK THIS OUT???????????????////////////////////////////// #define ll long long ////////////////////////////////???????????????CHECK THIS OUT???????????????////////////////////////////// #define ld long double #define pll pair<ll,ll> #define pii pair<int,int> #define m_p make_pair #define fast_io cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0); #define all(x) x.begin(),x.end() #define getfiles ifstream cin("input.txt");ofstream cout("output.txt"); #define pw(x) (1ll << x) #define sz(x) (ll)x.size() #define endl "\n" #define rall(x) x.rbegin(),x.rend() #define len(a) (ll)a.size() #define rep(x,l,r) for(ll x=l;x<r;x++) using namespace __gnu_pbds; ld eps = (ld)1 / 1e6; const ld pi=3.14159265359; ll inf = 1e18,mod1=1e9+7; ll sqr(ll a) { return a * a; } ll qb(ll a) { return a * a * a; } ll gcd(ll a, ll b) { return !a ? b : gcd(b % a, a); } ll binpow(ll a, ll b, ll mod) { return b ? (b % 2 ? (a * (sqr(binpow(a, b / 2, mod)) % mod)) % mod : sqr(binpow(a, b / 2, mod)) % mod) : 1; } ll binmult(ll a, ll b, ll mod) { return b ? (b % 2 ? (2 * binmult(a, b / 2, mod) + a) % mod : (2 * binmult(a, b / 2, mod)) % mod) : 0; } ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// const ll R=1e4; const ll tx[4]={0,0,-1,1}; const ll ty[4]={-1,1,0,0}; vector<pii>lol{{-1,1},{-1,0},{-1,-1}}; const char rev_to[4]={'E','W','N','S'}; const int N=3e2+100; const int M=1e9+7; //typedef tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> st; //int n,m,k; //int a[N],b[N]; //int f[N],cnt[26],dp[N]; int dp[N][N][N]; char a[N][N]; bool can_be[N][N][N]; bool used[N][N],is[N][N]; int n,m; vector<pair<char,pii>>loll[2*N]; void do_it(pii c,int level){ if(a[c.f][c.s]!='.'){ loll[level].p_b({a[c.f][c.s],{c.f,c.s}}); is[c.f][c.s]=1; }else{ for(auto &z : lol){ int nx=z.f+c.f,ny=z.s+c.s; if(a[nx][ny]!='#' && used[nx][ny] && !is[nx][ny]){ do_it({nx,ny},level); } } } } void go(int lvl){ for(auto &z : loll[lvl]){ for(auto &g : lol){ int ni=z.s.f+g.f,nj=z.s.s+g.s; if(!is[ni][nj] && a[ni][nj]!='*' && used[ni][nj]){ do_it({ni,nj},lvl+1); } } } sort(all(loll[lvl+1])); int ps=0; for(auto &z : loll[lvl+1]){ if(z.f==loll[lvl+1][0].f) ps++; } loll[lvl+1].resize(ps); } signed main() { cin>>n>>m; for(int i=0;i<=n+1;i++){ for(int j=0;j<=m+1;j++){ a[i][j]='*'; } } for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ cin>>a[i][j]; } } int st=-1; for(int i=1;i<=m;i++){ if(a[n][i]=='M') st=i; } dp[n][st][0]=1; for(int i=n;i>1;i--){ for(int j=1;j<=m;j++){ for(int bal=0;bal<=(n-i);bal++){ if(!dp[i][j][bal]) continue; for(auto &z : lol){ int ni=z.f+i,nj=z.s+j; if(a[ni][nj]!='*'){ if(a[ni][nj]=='.'){ dp[ni][nj][bal]=max(dp[ni][nj][bal],dp[i][j][bal]); } else if(a[ni][nj]==')'){ if(bal>0){ dp[ni][nj][bal-1]=max(dp[ni][nj][bal-1],dp[i][j][bal]+1); } }else{ dp[ni][nj][bal+1]=max(dp[ni][nj][bal+1],dp[i][j][bal]+1); } } } } } } pii mx={n,st}; for(int i=n;i>=1;i--){ for(int j=1;j<=m;j++){ if(!dp[i][j][0]) continue; bool ok=0; for(auto &z : lol){ int ni=z.f+i,nj=z.s+j; if(a[ni][nj]=='*'){ ok=1; } } if(ok){ if(dp[i][j][0]>dp[mx.f][mx.s][0]){ mx={i,j}; } } } } int cur=1; priority_queue<pair<pii,pii>,vector<pair<pii,pii>>,greater<pair<pii,pii>>>q; for(int i=n;i>=1;i--){ for(int j=1;j<=m;j++){ if(!dp[i][j][0]) continue; bool ok=0; for(auto &z : lol){ int ni=z.f+i,nj=z.s+j; if(a[ni][nj]=='*'){ ok=1; } } if(ok){ if(dp[i][j][0]==dp[mx.f][mx.s][0]){ can_be[i][j][0]=1; q.push({{dp[i][j][0],0},{i,j}}); used[i][j]=1; } } } } while(!q.empty()){ auto c=q.top(); auto bal=c.f.s,i=c.s.f,j=c.s.s,need=c.f.f; q.pop(); int who=(a[i][j]==')' ? -1 :(a[i][j]=='(' ? 1 : 0)); for(auto &z : lol){ int nx=-z.f+i,ny=-z.s+j; if(a[nx][ny]!='*' && !used[nx][ny]){ if(dp[nx][ny][bal-who]==dp[i][j][bal]-abs(who)){ q.push({{dp[nx][ny][bal-who],bal-who},{nx,ny}}); used[nx][ny]=1; } } } } cout<<dp[mx.f][mx.s][0]-1<<endl; loll[0].p_b({a[n][st],{n,st}}); for(int i=0;i<=n;i++){ if(sz(loll[i])){ go(i); } } for(int i=1;i<=n;i++){ if(sz(loll[i])){ cout<<loll[i][0].f; } // cout<<loll[i][0].f; } return 0; } /* 4 4 1 2 a 3 2 a 1 4 a 3 4 b */

Compilation message (stderr)

retro.cpp: In function 'int main()':
retro.cpp:200:40: warning: unused variable 'need' [-Wunused-variable]
         auto bal=c.f.s,i=c.s.f,j=c.s.s,need=c.f.f;
                                        ^~~~
retro.cpp:177:9: warning: unused variable 'cur' [-Wunused-variable]
     int cur=1;
         ^~~
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