#include<bits/stdc++.h> using namespace std; ostream& operator<<(ostream &out, string str) { for(char c : str) out << c; return out; } template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.first << ", " << p.second << ")"; } template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) { out << "{"; for(auto it = a.begin(); it != a.end(); it = next(it)) out << (it != a.begin() ? ", " : "") << *it; return out << "}"; } void dump() { cerr << "\n"; } template<class T, class... Ts> void dump(T a, Ts... x) { cerr << a << ", "; dump(x...); } #ifdef DEBUG # define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__) #else # define debug(...) false #endif #define REP(i, n) for(int i = 0; i < n; i++) #define FOR(i, a, b) for(int i = a; i <= b; i++) #define ST first #define ND second template<class T> int size(T && a) { return a.size(); } using LL = long long; using PII = pair<int, int>; template<int mod> struct mi { int val; mi() { val = 0; } mi(const LL& v) { val = (-mod <= v && v <= mod) ? v : v % mod; if(val < 0) val += mod; } friend ostream& operator<<(ostream &os, const mi &a) { return os << a.val; } friend istream& operator>>(istream &is, mi &a) { return is >> a.val; } friend bool operator==(const mi &a, const mi &b) { return a.val == b.val; } friend bool operator!=(const mi &a, const mi &b) { return !(a == b); } friend bool operator<(const mi &a, const mi &b) { return a.val < b.val; } friend bool operator<=(const mi &a, const mi &b) { return a.val <= b.val; } mi operator-() const { return mi(-val); } mi& operator+=(const mi &m) { if((val += m.val) >= mod) val -= mod; return *this; } mi& operator-=(const mi &m) { if((val -= m.val) < 0) val += mod; return *this; } mi& operator*=(const mi &m) { val = (LL) val * m.val % mod; return *this; } friend mi qpow(mi a, LL n) { if(n == 0) return 1; if(n % 2 == 1) return qpow(a, n - 1) * a; return qpow(a * a, n / 2); } friend mi inv(const mi &a) { assert(a != 0); return qpow(a, mod - 2); } mi& operator /=(const mi &m) { return (*this) *= inv(m); } friend mi operator+(mi a, const mi &b) { return a += b; } friend mi operator-(mi a, const mi &b) { return a -= b; } friend mi operator*(mi a, const mi &b) { return a *= b; } friend mi operator/(mi a, const mi &b) { return a /= b; } }; using MI = mi<int(1e9 + 7)>; struct Newton { vector<MI> fac, rev; Newton(int n) { fac = rev = vector<MI>(n + 1, 1); FOR(i, 1, n) fac[i] = fac[i - 1] * i; rev[n] = 1 / fac[n]; for(int i = n; i >= 1; i--) rev[i - 1] = rev[i] * i; } MI get(int n, int k) { return fac[n] * rev[n - k] * rev[k]; } }; struct hyperball { int r; bitset<10000> m; }; int n; Newton newton(0); MI intersection(vector<hyperball> balls) { assert(size(balls) == 3); array<int, 4> cnt = {0, 0, 0, 0}; for(int i : {1, 2}) balls[i].m ^= balls[0].m; REP(i, n) cnt[balls[1].m[i] * 2 + balls[2].m[i]]++; MI total = 0; vector<MI> cor1(cnt[0] + cnt[1] + 1); auto cor2 = cor1; vector<vector<MI>> tri1(cnt[0] + 1, vector<MI>(cnt[1] + 1)); FOR(j, 0, cnt[1]) { MI sum = 0; MI r = newton.get(cnt[1], j); FOR(i, 0, cnt[0]) { MI q = r * newton.get(cnt[0], i); total += q, sum += q; cor1[i + j] += q; cor2[i + cnt[1] - j] += q; tri1[i][j] = sum; } } auto tri2 = tri1; for(int i = size(cor1) - 1; i >= 1; i--) cor1[i - 1] += cor1[i]; for(int i = size(cor2) - 1; i >= 1; i--) cor2[i - 1] += cor2[i]; FOR(i, 0, cnt[0]) FOR(j, 0, cnt[1]) { if(i && j) tri1[i][j] += tri1[i - 1][j - 1]; if(i && j != cnt[1]) tri2[i][j] += tri2[i - 1][j + 1]; } MI res = 0; FOR(c, 0, min(balls[0].r, cnt[2])) { MI _q = newton.get(cnt[2], c); FOR(d, 0, min(balls[0].r - c, cnt[3])) { MI q = _q * newton.get(cnt[3], d); int c1 = min(balls[0].r - c - d, balls[1].r - cnt[2] - cnt[3] + c + d); int c2 = balls[2].r - cnt[1] - cnt[3] - c + d; if(c1 < 0 || c2 < -cnt[1]) continue; int a = c1 + c2; if(a % 2 != 0) a--; a /= 2; int b = a - c2; if(a <= cnt[0]) { if(a < 0) continue; if(b < 0) { if(c1 >= 0) res += tri2[c1][0] * q; continue; } if(cnt[1] <= b) { b = cnt[1]; a = c2 + b; if(a >= 0) res += tri1[a][b] * q; continue; } res += tri1[a][b] * q; b++, a = c1 - b; if(a >= 0) res += tri2[a][b] * q; } else { res += total * q; if(c1 + 1 < size(cor1)) res -= cor1[c1 + 1] * q; if(c2 + cnt[1] + 1 < size(cor2)) res -= cor2[c2 + cnt[1] + 1] * q; } } } return res; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n; newton = Newton(n); auto read = [&]() { hyperball b; cin >> b.r >> b.m; return b; }; vector balls = {read(), read(), read()}; MI ans = 0; REP(i, 3) ans += intersection({balls[i], balls[i], balls[i]}); REP(i, 3) REP(j, i) ans -= intersection({balls[i], balls[j], balls[j]}); ans += intersection(balls); cout << ans << "\n"; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | #include<bits/stdc++.h> using namespace std; ostream& operator<<(ostream &out, string str) { for(char c : str) out << c; return out; } template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.first << ", " << p.second << ")"; } template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) { out << "{"; for(auto it = a.begin(); it != a.end(); it = next(it)) out << (it != a.begin() ? ", " : "") << *it; return out << "}"; } void dump() { cerr << "\n"; } template<class T, class... Ts> void dump(T a, Ts... x) { cerr << a << ", "; dump(x...); } #ifdef DEBUG # define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__) #else # define debug(...) false #endif #define REP(i, n) for(int i = 0; i < n; i++) #define FOR(i, a, b) for(int i = a; i <= b; i++) #define ST first #define ND second template<class T> int size(T && a) { return a.size(); } using LL = long long; using PII = pair<int, int>; template<int mod> struct mi { int val; mi() { val = 0; } mi(const LL& v) { val = (-mod <= v && v <= mod) ? v : v % mod; if(val < 0) val += mod; } friend ostream& operator<<(ostream &os, const mi &a) { return os << a.val; } friend istream& operator>>(istream &is, mi &a) { return is >> a.val; } friend bool operator==(const mi &a, const mi &b) { return a.val == b.val; } friend bool operator!=(const mi &a, const mi &b) { return !(a == b); } friend bool operator<(const mi &a, const mi &b) { return a.val < b.val; } friend bool operator<=(const mi &a, const mi &b) { return a.val <= b.val; } mi operator-() const { return mi(-val); } mi& operator+=(const mi &m) { if((val += m.val) >= mod) val -= mod; return *this; } mi& operator-=(const mi &m) { if((val -= m.val) < 0) val += mod; return *this; } mi& operator*=(const mi &m) { val = (LL) val * m.val % mod; return *this; } friend mi qpow(mi a, LL n) { if(n == 0) return 1; if(n % 2 == 1) return qpow(a, n - 1) * a; return qpow(a * a, n / 2); } friend mi inv(const mi &a) { assert(a != 0); return qpow(a, mod - 2); } mi& operator /=(const mi &m) { return (*this) *= inv(m); } friend mi operator+(mi a, const mi &b) { return a += b; } friend mi operator-(mi a, const mi &b) { return a -= b; } friend mi operator*(mi a, const mi &b) { return a *= b; } friend mi operator/(mi a, const mi &b) { return a /= b; } }; using MI = mi<int(1e9 + 7)>; struct Newton { vector<MI> fac, rev; Newton(int n) { fac = rev = vector<MI>(n + 1, 1); FOR(i, 1, n) fac[i] = fac[i - 1] * i; rev[n] = 1 / fac[n]; for(int i = n; i >= 1; i--) rev[i - 1] = rev[i] * i; } MI get(int n, int k) { return fac[n] * rev[n - k] * rev[k]; } }; struct hyperball { int r; bitset<10000> m; }; int n; Newton newton(0); MI intersection(vector<hyperball> balls) { assert(size(balls) == 3); array<int, 4> cnt = {0, 0, 0, 0}; for(int i : {1, 2}) balls[i].m ^= balls[0].m; REP(i, n) cnt[balls[1].m[i] * 2 + balls[2].m[i]]++; MI total = 0; vector<MI> cor1(cnt[0] + cnt[1] + 1); auto cor2 = cor1; vector<vector<MI>> tri1(cnt[0] + 1, vector<MI>(cnt[1] + 1)); FOR(j, 0, cnt[1]) { MI sum = 0; MI r = newton.get(cnt[1], j); FOR(i, 0, cnt[0]) { MI q = r * newton.get(cnt[0], i); total += q, sum += q; cor1[i + j] += q; cor2[i + cnt[1] - j] += q; tri1[i][j] = sum; } } auto tri2 = tri1; for(int i = size(cor1) - 1; i >= 1; i--) cor1[i - 1] += cor1[i]; for(int i = size(cor2) - 1; i >= 1; i--) cor2[i - 1] += cor2[i]; FOR(i, 0, cnt[0]) FOR(j, 0, cnt[1]) { if(i && j) tri1[i][j] += tri1[i - 1][j - 1]; if(i && j != cnt[1]) tri2[i][j] += tri2[i - 1][j + 1]; } MI res = 0; FOR(c, 0, min(balls[0].r, cnt[2])) { MI _q = newton.get(cnt[2], c); FOR(d, 0, min(balls[0].r - c, cnt[3])) { MI q = _q * newton.get(cnt[3], d); int c1 = min(balls[0].r - c - d, balls[1].r - cnt[2] - cnt[3] + c + d); int c2 = balls[2].r - cnt[1] - cnt[3] - c + d; if(c1 < 0 || c2 < -cnt[1]) continue; int a = c1 + c2; if(a % 2 != 0) a--; a /= 2; int b = a - c2; if(a <= cnt[0]) { if(a < 0) continue; if(b < 0) { if(c1 >= 0) res += tri2[c1][0] * q; continue; } if(cnt[1] <= b) { b = cnt[1]; a = c2 + b; if(a >= 0) res += tri1[a][b] * q; continue; } res += tri1[a][b] * q; b++, a = c1 - b; if(a >= 0) res += tri2[a][b] * q; } else { res += total * q; if(c1 + 1 < size(cor1)) res -= cor1[c1 + 1] * q; if(c2 + cnt[1] + 1 < size(cor2)) res -= cor2[c2 + cnt[1] + 1] * q; } } } return res; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n; newton = Newton(n); auto read = [&]() { hyperball b; cin >> b.r >> b.m; return b; }; vector balls = {read(), read(), read()}; MI ans = 0; REP(i, 3) ans += intersection({balls[i], balls[i], balls[i]}); REP(i, 3) REP(j, i) ans -= intersection({balls[i], balls[j], balls[j]}); ans += intersection(balls); cout << ans << "\n"; } |