結果
問題 | No.460 裏表ちわーわ |
ユーザー | koyumeishi |
提出日時 | 2016-12-11 00:50:03 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 5,635 bytes |
コンパイル時間 | 1,440 ms |
コンパイル使用メモリ | 120,004 KB |
実行使用メモリ | 6,824 KB |
最終ジャッジ日時 | 2024-11-29 02:41:42 |
合計ジャッジ時間 | 3,451 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,820 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,816 KB |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | AC | 2 ms
6,820 KB |
testcase_09 | AC | 2 ms
6,816 KB |
testcase_10 | AC | 2 ms
6,820 KB |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | RE | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | RE | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | AC | 2 ms
6,816 KB |
testcase_25 | AC | 2 ms
6,820 KB |
testcase_26 | AC | 2 ms
6,816 KB |
testcase_27 | AC | 2 ms
6,816 KB |
ソースコード
#include <iostream> #include <vector> #include <cstdio> #include <sstream> #include <map> #include <string> #include <algorithm> #include <queue> #include <cmath> #include <functional> #include <set> #include <ctime> #include <random> #include <chrono> #include <cassert> #include <tuple> #include <utility> using namespace std; namespace { using Integer = long long; //__int128; template<class T, class S> istream& operator >> (istream& is, pair<T,S>& p){return is >> p.first >> p.second;} template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;} template<class T> istream& operator , (istream& is, T& val){ return is >> val;} template<class T, class S> ostream& operator << (ostream& os, const pair<T,S>& p){return os << p.first << " " << p.second;} template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(size_t i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;} template<class T> ostream& operator , (ostream& os, const T& val){ return os << " " << val;} template<class H> void print(const H& head){ cout << head; } template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); } template<class ... T> void println(const T& ... values){ print(values...); cout << endl; } template<class H> void eprint(const H& head){ cerr << head; } template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); } template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; } class range{ Integer start_, end_, step_; public: struct range_iterator{ Integer val, step_; range_iterator(Integer v, Integer step) : val(v), step_(step) {} Integer operator * (){return val;} void operator ++ (){val += step_;} bool operator != (range_iterator& x){return step_ > 0 ? val < x.val : val > x.val;} }; range(Integer len) : start_(0), end_(len), step_(1) {} range(Integer start, Integer end) : start_(start), end_(end), step_(1) {} range(Integer start, Integer end, Integer step) : start_(start), end_(end), step_(step) {} range_iterator begin(){ return range_iterator(start_, step_); } range_iterator end(){ return range_iterator( end_, step_); } }; inline string operator "" _s (const char* str, size_t size){ return move(string(str)); } constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);} constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);} constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); } inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexed mt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count()); template<class T> string join(const vector<T>& v, const string& sep){ stringstream ss; for(size_t i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str(); } inline string operator * (string s, int k){ string ret; while(k){ if(k&1) ret += s; s += s; k >>= 1; } return ret; } } constexpr long long mod = 9_ten + 7; // A[n*p] * X[p*m] = B[n*m] template<class T = long long> vector<T> gaussian_elimination_binary(vector<T> A, vector<T> B, int n, int p, int m){ vector<T> M(n); for(int i=0; i<n; i++){ M[i] = A[i] << m; M[i] |= B[i]; } int rank = 0; vector<int> left_most(n,-1); for(int row = 0, col = p+m-1; row<n && col>=m; col--){ if( ((M[row] >> col) & T(1)) == T(0)){ int pivot = row; for(int row__ = row; row__<n; row__++){ if( ((M[row__] >> col) & T(1)) != T(0) ){ pivot = row__; break; } } if(pivot == row) continue; swap(M[row], M[pivot]); } rank++; left_most[row] = col; for(int row__=row+1; row__<n; row__++){ if( ((M[row__] >> col) & T(1)) != T(0) ) M[row__] ^= M[row]; } row++; } // T = long long //T mask_B = ((T)1<<m) - 1; //T mask_A = (((T)1<<(m+p)) - 1) ^ mask_B; // T = bitset T mask_B( string(m, '1') ); T mask_A( string(m+p, '1') ); mask_A ^= mask_B; bool has_solution = true; for(int row=n-1; row>=0; row--){ if( (M[row] & mask_B) != T(0) && (M[row] & mask_A) == T(0) ) has_solution = false; if(left_most[row] == -1) continue; int col = left_most[row]; for(int row__ = row-1; row__>=0; row__--){ if( ((M[row__] >> col) & T(1)) != T(0) ) M[row__] ^= M[row]; } } return has_solution? M : vector<T>(0); } int dx[] = {0, 0, 1,-1, 1, 1,-1,-1}; int dy[] = {1,-1, 0, 0, 1,-1, 1,-1}; #include <bitset> using bits = bitset<300>; int main(){ int n,m; cin >> n,m; vector<vector<int>> v(n, vector<int>(m)); cin >> v; vector<bits> B(n*m); for(int i=0; i<n; i++){ for(int j=0; j<m; j++){ if( v[i][j] ) B[i*m+j].set(0, 1); } } //eprintln("B\n", join(B,"\n")); vector<bits> A(n*m); for(int i=0; i<n; i++){ for(int j=0; j<m; j++){ A[i*m + j].set(i*m+j, 1); for(int k=0; k<8; k++){ int y = i+dy[k]; int x = j+dx[k]; if(y<0 || y>=n || x<0 || x>=m) continue; A[i*m+j].set(y*m+x, 1); } } } //eprintln("A\n", join(A,"\n")); auto res = gaussian_elimination_binary<bits>(A,B, n*m, n*m, 1); //eprintln( join(res, "\n")); int ans = 0; for(int i=0; i<m*n; i++){ ans += res[i][0]; } println(ans); return 0; }