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Graph Automata Player
题目here
第一道快速幂,同时也是第一道高斯消元。
输入的边的关系矩阵就是系数矩阵co
[co] ^ T * [ans]== (当前0时刻的状态),[co] ^ T可由矩阵快速幂解得
那么-T时刻的状态便是ans矩阵的值,可由高斯消元解得
判断一下即可
高斯消元中 系数矩阵是a[0...n - 1][0...m - 1] 常数矩阵是a[0...n - 1][m]
返回-1表示无解,等于0有唯一解,大于0表示不确定的变量个数
#include <cstdio> #include <ctime> #include <cstdlib> #include <cstring> #include <queue> #include <string> #include <set> #include <stack> #include <map> #include <cmath> #include <vector> #include <iostream> #include <algorithm> #include <bitset> #include <fstream> using namespace std; //LOOP #define FF(i, a, b) for(int i = (a); i < (b); ++i) #define FE(i, a, b) for(int i = (a); i <= (b); ++i) #define FED(i, b, a) for(int i = (b); i>= (a); --i) #define REP(i, N) for(int i = 0; i < (N); ++i) #define CLR(A,value) memset(A,value,sizeof(A)) #define FC(it, c) for(__typeof((c).begin()) it = (c).begin(); it != (c).end(); it++) //OTHER #define SZ(V) (int)V.size() #define PB push_back #define MP make_pair #define all(x) (x).begin(),(x).end() //INPUT #define RI(n) scanf("%d", &n) #define RII(n, m) scanf("%d%d", &n, &m) #define RIII(n, m, k) scanf("%d%d%d", &n, &m, &k) #define RIV(n, m, k, p) scanf("%d%d%d%d", &n, &m, &k, &p) #define RV(n, m, k, p, q) scanf("%d%d%d%d%d", &n, &m, &k, &p, &q) #define RS(s) scanf("%s", s) //OUTPUT #define WI(n) printf("%d\n", n) #define WS(n) printf("%s\n", n) //debug //#define online_judge #ifndef online_judge #define dt(a) << (#a) << "=" << a << " " #define debugI(a) cout dt(a) << endl #define debugII(a, b) cout dt(a) dt(b) << endl #define debugIII(a, b, c) cout dt(a) dt(b) dt(c) << endl #define debugIV(a, b, c, d) cout dt(a) dt(b) dt(c) dt(d) << endl #define debugV(a, b, c, d, e) cout dt(a) dt(b) dt(c) dt(d) dt(e) << endl #else #define debugI(v) #define debugII(a, b) #define debugIII(a, b, c) #define debugIV(a, b, c, d) #endif #define sqr(x) (x) * (x) typedef long long LL; typedef unsigned long long ULL; typedef vector <int> VI; const double eps = 1e-9; const int MOD = 1000000007; const double PI = acos(-1.0); //const int INF = 0x3f3f3f3f; const int maxn = 310; const LL INF = 0x3f3f3f3f3f3f3f3fLL; struct Mat{ int n, m; bool v[maxn][maxn]; Mat(int n = 0, int m = 0, int zero = 0) { this->n = n; this->m = m; if (zero) { REP(i, n) REP(j, m) v[i][j] = false; } } }; Mat mul(Mat& a, Mat&b) { Mat ret(a.n, b.m, 1); REP(i, a.n) REP(j, b.m) REP(k, a.m) ret.v[i][j] ^= (a.v[i][k] & b.v[k][j]); return ret; } Mat qpow(Mat& a, int b) { Mat ret(a.n, a.m); bool f = 1; while (b) { if (b & 1) { if (f) ret = a, f = 0; else ret = mul(ret, a); } b >>= 1; a = mul(a, a); } return ret; } bool a[maxn][maxn]; int gauss(int N, int M) { int r, c, pvt; bool flag; for (r = 0, c = 0; r < N && c < M; r++, c++) { flag = false; for (int i = r; i < N; i++) if (a[i][c]) { flag = a[pvt = i][c]; break; } if (!flag) { r--; continue; } if (pvt != r) for (int j = r; j <= M; j++) swap(a[r][j], a[pvt][j]); for (int i = r + 1; i < N; ++i) { if (a[i][c]) { a[i][c] = false; for (int j = c + 1; j <= M; ++j) if (a[r][j]) a[i][j] = !a[i][j]; } } } for (int i = r; i < N; i++) if (a[i][M]) return -1; if (r < M) return M - r; for (int i = M - 1; i >= 0; i--) { for (int j = i + 1; j < M; j++) if (a[i][j]) a[i][M] ^= a[j][M]; a[i][M] /= a[i][i]; } return 0; } int main() { int n, T, x; while (~RI(n)) { Mat co(n, n); REP(i, n) REP(j, n) { RI(x); co.v[i][j] = (x == 1 ? true : false); } REP(i, n) { RI(x); a[i][n] = (x == 1 ? true : false); } RI(T); co = qpow(co, T); REP(i, n) REP(j, n) a[i][j] = co.v[i][j]; int ans = gauss(n, n); if (ans == -1) puts("none"); else if (ans) puts("ambiguous"); else { REP(i, n) printf("%d%c", a[i][n], (i == n - 1 ? '\n' : ' ')); } } return 0; }
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