結果
問題 | No.460 裏表ちわーわ |
ユーザー | koyumeishi |
提出日時 | 2016-12-11 02:07:30 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,824 bytes |
コンパイル時間 | 1,487 ms |
コンパイル使用メモリ | 115,208 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-11-29 02:57:07 |
合計ジャッジ時間 | 2,361 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 3 ms
5,248 KB |
testcase_01 | AC | 3 ms
5,248 KB |
testcase_02 | AC | 3 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 3 ms
5,248 KB |
testcase_07 | AC | 3 ms
5,248 KB |
testcase_08 | AC | 4 ms
5,248 KB |
testcase_09 | AC | 3 ms
5,248 KB |
testcase_10 | AC | 5 ms
5,248 KB |
testcase_11 | AC | 3 ms
5,248 KB |
testcase_12 | AC | 3 ms
5,248 KB |
testcase_13 | WA | - |
testcase_14 | AC | 7 ms
5,248 KB |
testcase_15 | WA | - |
testcase_16 | AC | 3 ms
5,248 KB |
testcase_17 | AC | 7 ms
5,248 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | AC | 3 ms
5,248 KB |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | AC | 4 ms
5,248 KB |
testcase_25 | AC | 2 ms
5,248 KB |
testcase_26 | AC | 3 ms
5,248 KB |
testcase_27 | WA | - |
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; long long extgcd(long long a, long long b, long long &x, long long &y){ long long d=a; if(b!=0){ d = extgcd(b, a%b, y, x); y -= (a/b) * x; }else{ x = 1; y = 0; } return d; } long long mod_inverse(long long a, long long m){ long long x,y; extgcd(a,m,x,y); return (m+x%m)%m; } // A[n*p] * X[p*m] = B[n*m] template<class T = int> vector<vector<T>> gaussian_elimination_with_mod(vector<vector<T>>& A, vector<vector<T>>& B, int n, int p, int m, const T mod){ int R = max(n,p); int C = p+m; vector<vector<T>> V( R, vector<T>(C, 0) ); for(int i=0; i<n; i++) for(int j=0; j<p; j++) V[i][j] = A[i][j]; for(int i=0; i<n; i++) for(int j=0; j<m; j++) V[i][j+p] = B[i][j]; int rank = 0; int row = 0; vector<int> left(R, -1); //foward for(int col=0; col<p && row<R; col++){ //pivot T val = abs( V[row][col] ); int pivot = row; for(int j=row+1; j<R; j++){ if(val < abs( V[j][col] )){ val = abs( V[j][col] ); pivot = j; } } if(pivot != row) swap(V[row], V[pivot]); if(val == 0) continue; T inv = mod_inverse(val, mod); for(int j=row+1; j<R; j++){ T c = (V[j][col] * inv + mod) % mod; for(int k=col; k<p+m; k++) V[j][k] = ((V[j][k] - V[row][k] * c) % mod + mod) % mod; } left[row] = col; row++; rank++; } cerr << "rank = " << rank << endl; //return rank; //backward for(int i=R-1; i>=0; i--){ bool zero = true; bool valid = true; for(int col=0; col<p; col++) if(V[i][col] != 0) zero = false; for(int col = p; zero && col<C; col++) if(V[i][col] != 0) valid = false; if(valid == false) return {}; //no solution if(left[i] == -1) continue; T inv = mod_inverse(V[i][ left[i] ], mod); for(int j=left[i]; j<C; j++) V[i][j] = (V[i][j] * inv) % mod; for(int j=i-1; j>=0; j--){ if(V[j][left[i]] == 0) continue; for(int k=0; k<C; k++){ V[j][k] = ( (V[j][k] - V[i][k]) % mod + mod ) % mod; } } } return V; //return rank; } int dx[] = {0, 0, 1,-1, 1, 1,-1,-1}; int dy[] = {1,-1, 0, 0, 1,-1, 1,-1}; int main(){ int n,m; cin >> n,m; vector<vector<int>> v(n, vector<int>(m)); cin >> v; vector<vector<int>> B(n*m, vector<int>(1,0)); for(int i=0; i<n; i++){ for(int j=0; j<m; j++){ if( v[i][j] ) B[i*m+j][0] = 1; } } eprintln("B\n", join(B,"\n")); vector<vector<int>> A(n*m, vector<int>(n*m, 0)); for(int i=0; i<n; i++){ for(int j=0; j<m; j++){ A[i*m + j][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][y*m+x] = 1; } } } eprintln("A\n", join(A,"\n")); auto res = gaussian_elimination_with_mod(A,B, n*m, n*m, 1, 2); if(res.size()==0){ println("Impossible"); return 0; } eprintln( "res\n", join(res, "\n")); int ans = 0; for(int i=0; i<m*n; i++){ ans += res[i][n*m]; } vector<vector<int>> u(n, vector<int>(m)); for(int i=0; i<n; i++){ for(int j=0; j<m; j++){ int p = i*m+j; if( res[p][n*m] == 0 ) continue; u[i][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; u[y][x] ^= 1; } for(int i=0; i<n; i++){ eprintln(u[i]); } } } for(int i=0; i<n; i++){ eprintln(u[i]); } println(ans); return 0; }