/* 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 /*多倍長整数/cpp_intで宣言 #include using namespace boost::multiprecision; */ //#pragma gcc target ("avx2") //#pragma gcc optimization ("o3") //#pragma gcc optimization ("unroll-loops") #define rep(i, n) for(int i = 0; i < (n); ++i) #define rep1(i, n) for(int i = 1; i <= (n); ++i) #define rep2(i, n) for(int i = 2; i < (n); ++i) #define repr(i, n) for(int i = n; i >= 0; --i) #define reprm(i, n) for(int i = n - 1; i >= 0; --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) //少数出力 #define printdbd(a) printf("%.16lf\n", a) //少数出力(桁少なめ) #define prints(s) printf("%s\n", s.c_str()) //string出力 #define all(x) (x).begin(), (x).end() #define allsum(a, b, c) ((a + b) * c / 2.0) //等差数列の和、初項,末項,項数 #define pb push_back #define priq priority_queue #define rpriq priq, greater> #define deg_to_rad(deg) (((deg)/360.0)*2.0*PI) #define rad_to_deg(rad) (((rad)/2.0/PI)*360.0) #define Please return #define AC 0 #define addf(T) [](T a, T b){return (a + b);} #define minf(T) [](T a, T b){return min(a, b);} #define maxf(T) [](T a, T b){return max(a, b);} #define nopf(T) [](T a){return a;} #define manhattan_dist(a, b, c, d) (abs(a - c) + abs(b - d)) /*(a, b) から (c, d) のマンハッタン距離 */ using ll = long long; constexpr int INF = 1073741823; constexpr int MINF = -1073741823; constexpr ll LINF = ll(4661686018427387903); constexpr ll MOD = 1000000007; const long double PI = acos(-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 gcd(ll a, ll b) { if (b == 0) return a; return gcd(b, a % b); } ll lcm(ll number1, ll number2) { return number1 / gcd(number1, number2) * number2; } ll LSB(ll n) { return (n & (-n)); } /*-----------------------------------------ここからコード-----------------------------------------*/ //素因数分解 map< int64_t, int > prime_factor(int64_t n) { map< int64_t, int > ret; for (int64_t i = 2; i * i <= n; i++) { while (n % i == 0) { ret[i]++; n /= i; } } if (n != 1) ret[n] = 1; return ret; } int main() { int n; scanf("%d", &n); vector ans(n + 1); ll mini = INF; rep1(i, n) { auto p = prime_factor(i); ans[i] = 1; for (const auto &aa : p) { ans[i] *= (aa.second + 1); } ans[i] = i - ans[i]; } rep1(i, n - 1) { mini = min(mini, abs(ans[i] - ans[n - i])); } rep1(i, n - 1) { if (mini == abs(ans[i] - ans[n - i]))printf("%d %d\n", i, n - i); } Please AC; }