Submission #152292

#TimeUsernameProblemLanguageResultExecution timeMemory
15229212tqianDango Maker (JOI18_dango_maker)C++14
100 / 100
1219 ms115320 KiB
#pragma comment(linker, "/stack:200000000") //#pragma GCC optimize("Ofast") //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") #pragma GCC optimize ("O3") #pragma GCC target ("sse4") #include <bits/stdc++.h> #include <ext/pb_ds/tree_policy.hpp> #include <ext/pb_ds/assoc_container.hpp> using namespace std; using namespace __gnu_pbds; template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>; const double PI = 4 * atan(1); #define sz(x) (int)(x).size() #define ll long long #define ld long double #define mp make_pair #define pb push_back #define eb emplace_back #define pii pair <int, int> #define vi vector<int> #define f first #define s second #define lb lower_bound #define ub upper_bound #define all(x) x.begin(), x.end() #define vpi vector<pair<int, int>> #define vpd vector<pair<double, double>> #define pd pair<double, double> #define f0r(i,a) for(int i=0;i<a;i++) #define f1r(i,a,b) for(int i=a;i<b;i++) #define trav(a, x) for (auto& a : x) template<typename A, typename B> ostream& operator<<(ostream &cout, pair<A, B> const &p) { return cout << "(" << p.f << ", " << p.s << ")"; } template<typename A> ostream& operator<<(ostream &cout, vector<A> const &v) { cout << "["; for(int i = 0; i < v.size(); i++) {if (i) cout << ", "; cout << v[i];} return cout << "]"; } void fast_io(){ ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL); } void io(string taskname){ string fin = taskname + ".in"; string fout = taskname + ".out"; const char* FIN = fin.c_str(); const char* FOUT = fout.c_str(); freopen(FIN, "r", stdin); freopen(FOUT, "w", stdout); fast_io(); } const int MAX = 3005; const int INF = 1e9; int grid[MAX][MAX]; int good [2][MAX][MAX]; vi pre; inline int get(int l, int r){ if(l>r) return 0; return pre[r] - (l == 0? 0: pre[l-1]); } int solve(vi&a, vi&b){ int sz = sz(a); int ret = 0; vi dp; f0r(i, sz) dp.eb(0); pre.clear(); f0r(i, sz) pre.eb(0); f0r(i, sz){ if(i == 0) pre[i] = b[i]; else pre[i] = pre[i-1] + b[i]; } int sum = 0; f0r(i, sz) sum += a[i]; ret = max(sum, ret); sum = 0; f0r(i, sz) sum += b[i]; ret = max(sum, ret); // cout << a << " " << b << " " << pre << endl; int mx = -INF; f0r(i, sz){ if(i>2){ mx = max(mx, dp[i-3] - pre[i-3]); } if(a[i] == 0){ continue; } if(i>2) dp[i] = a[i] + get(0, i-3); else dp[i] = a[i]; if(i>0){ dp[i] = max(dp[i], dp[i-1] + a[i]); } if(i>1){ dp[i] = max(dp[i], dp[i-2] + a[i]); } if(i>2){ dp[i] = max(dp[i], mx + pre[i-3] + a[i]); } } f0r(i, sz){ ret = max(ret, dp[i] + get(i+1, sz-1)); } return ret; } int main(){ int n, m; cin >> n >> m; string temporary; getline(cin, temporary); f0r(i, n){ string line; getline(cin, line); f0r(j, m){ if(line[j] == 'R') grid[i][j] = 0; else if (line[j] == 'G') grid[i][j] = 1; else grid[i][j] = 2; } } f0r(i, n){ f0r(j, m-2){ if(grid[i][j] == 0 && grid[i][j+1] == 1 && grid[i][j+2] == 2) good[0][i][j] = 1; } } f0r(i, n-2){ f0r(j, m){ if(grid[i][j] == 0 && grid[i+1][j] == 1 && grid[i+2][j] == 2) good[1][i][j] = 1; } } int ans = 0; f0r(sum, m+n-1){ vi a; //a connected to three behind inclusive vi b; //b conected to three ahead inclusive f0r(j, sum+1){ int x = j; int y = sum - j; if(x<0 || y <0 || x>= n || y>=m) continue; a.eb(good[1][x][y]); b.eb(good[0][x][y]); } reverse(all(a)); reverse(all(b)); ans += solve(a, b); // cout << a << endl << b << endl << solve(a, b) << endl << endl; } cout << ans << endl; /* int ones = 7; vi a; vi b; f0r(i, ones){ a.eb(1); b.eb(1); } cout << a << endl << b << endl << solve(a, b) << endl;*/ return 0; }

Compilation message (stderr)

dango_maker.cpp:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")
 
dango_maker.cpp: In function 'void io(std::__cxx11::string)':
dango_maker.cpp:52:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FIN, "r", stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~
dango_maker.cpp:53:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(FOUT, "w", stdout);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~
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