/* このコード、と~おれ! Be accepted! ∧_∧  (。・ω・。)つ━☆・*。 ⊂   ノ    ・゜+.  しーJ   °。+ *´¨)          .· ´¸.·*´¨) ¸.·*¨)           (¸.·´ (¸.·'* ☆ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include //#pragma GCC target("arch=skylake-avx512") #pragma GCC target("avx2") //#pragma GCC optimize("O3") #pragma GCC optimize("Ofast") #pragma GCC target("sse4") #pragma GCC optimize("unroll-loops") //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") #define repeat(i, n, m) for(int i = n; i < (m); ++i) #define rep(i, n) for(int i = 0; i < (n); ++i) #define printynl(a) printf(a ? "yes\n" : "no\n") #define printyn(a) printf(a ? "Yes\n" : "No\n") #define printYN(a) printf(a ? "YES\n" : "NO\n") #define printim(a) printf(a ? "possible\n" : "imposible\n") #define printdb(a) printf("%.50lf\n", a) #define printLdb(a) printf("%.50Lf\n", a) #define printdbd(a) printf("%.16lf\n", a) #define prints(s) printf("%s\n", s.c_str()) #define all(x) (x).begin(), (x).end() #define deg_to_rad(deg) (((deg)/360.0L)*2.0L*PI) #define rad_to_deg(rad) (((rad)/2.0L/PI)*360.0L) #define Please return #define AC 0 #define manhattan_dist(a, b, c, d) (abs(a - c) + abs(b - d)) using ll = long long; using ull = unsigned long long; constexpr int INF = 1073741823; constexpr int MINF = -1073741823; constexpr ll LINF = ll(4661686018427387903); constexpr ll MOD = 1e9 + 7; constexpr ll mod = 998244353; constexpr long double eps = 1e-6; const long double PI = acosl(-1.0L); using namespace std; void scans(string& str) { char c; str = ""; scanf("%c", &c); if (c == '\n')scanf("%c", &c); while (c != '\n' && c != -1 && c != ' ') { str += c; scanf("%c", &c); } } void scanc(char& str) { char c; scanf("%c", &c); if (c == -1)return; while (c == '\n') { scanf("%c", &c); } str = c; } double acot(double x) { return PI / 2 - atan(x); } ll LSB(ll n) { return (n & (-n)); } template inline T chmin(T& a, const T& b) { if (a > b)a = b; return a; } template inline T chmax(T& a, const T& b) { if (a < b)a = b; return a; } //cpp_int #if __has_include() #include #include using namespace boost::multiprecision; #else using cpp_int = ll; #endif //atcoder library #if __has_include() #include //using namespace atcoder; #endif /* random_device seed_gen; mt19937 engine(seed_gen()); uniform_int_distribution dist(1, 100); */ /*----------------------------------------------------------------------------------*/ /** * @brief Cumulative-Sum-2D(二次元累積和) * @docs docs/cumulative-sum-2d.md */ template< class T > struct CumulativeSum2D { vector< vector< T > > data; CumulativeSum2D(int W, int H) : data(W + 1, vector< T >(H + 1, 0)) {} void add(int x, int y, T z) { ++x, ++y; if (x >= data.size() || y >= data[0].size()) return; data[x][y] += z; } void build() { for (int i = 1; i < data.size(); i++) { for (int j = 1; j < data[i].size(); j++) { data[i][j] += data[i][j - 1] + data[i - 1][j] - data[i - 1][j - 1]; } } } T query(int sx, int sy, int gx, int gy) const { return (data[gx][gy] - data[sx][gy] - data[gx][sy] + data[sx][sy]); } }; //from: https://ei1333.github.io/library/dp/cumulative-sum-2d.cpp int main() { int n, m = 10002; scanf("%d", &n); vector r(3, vector(m / 2)); rep(i, 3) { rep(j, n) { ll a; scanf("%lld", &a); ++r[i][a]; } } ll ans = 0; CumulativeSum2D cs(m / 2, m); rep(i, m / 2) { rep(j, m / 2) { cs.add(max(i, j), i + j, r[1][i] * r[2][j]); } } cs.build(); rep(i, m / 2) { ans += cs.query(0, i + 1, i + 1, m) * r[0][i]; } printf("%lld\n", ans); Please AC; }