結果
問題 | No.1036 Make One With GCD 2 |
ユーザー |
|
提出日時 | 2020-04-26 04:32:42 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 312 ms / 2,000 ms |
コード長 | 1,541 bytes |
コンパイル時間 | 942 ms |
コンパイル使用メモリ | 51,692 KB |
最終ジャッジ日時 | 2025-01-10 01:51:25 |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 41 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:68:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 68 | scanf("%d", &n); | ~~~~~^~~~~~~~~~ main.cpp:69:35: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 69 | for(int i = 0; i < n; i++) scanf("%llu", A+i); | ~~~~~^~~~~~~~~~~~~
ソースコード
#include <cstdio>#include <cstdint>#include <stack>// using u64 = uint64_t;using u64 = unsigned long long int;u64 bgcd(u64 x, u64 y){if(x == 0) return y;if(y == 0) return x;int bx = __builtin_ctzll(x);int by = __builtin_ctzll(y);int k = (bx < by) ? bx : by;x >>= bx;y >>= by;while(x!=y){if(x < y){y -= x;y >>= __builtin_ctzll(y);}else {x -= y;x >>= __builtin_ctzll(x);}}return x << k;}struct u64GCDMonoid {using element_type = u64;static u64 op(u64 x, u64 y) {return bgcd(x, y);}static constexpr u64 id = 0;};template <typename M>struct swag {using T = typename M::element_type;std::stack<T> l, r, cl, cr;swag(){cl.push(M::id);cr.push(M::id);}void push_back(const T &x){ r.push(x); cr.push(M::op(cr.top(), x)); };void pop_front(){if(l.empty()){while(!r.empty()){l.push(r.top());r.pop();cr.pop();cl.push(M::op(cl.top(), l.top()));}}l.pop();cl.pop();}T fold() const {return M::op(cl.top(), cr.top());}};int n;u64 A[500001];int main(){scanf("%d", &n);for(int i = 0; i < n; i++) scanf("%llu", A+i);swag<u64GCDMonoid> s;u64 ans = 0;int r = 0;for(int l = 0; l <= r; l++){for(; r <= n; r++){if(s.fold() == 1){// printf("(%d, %d) ", l, r-1);ans += n - r + 1;break;}s.push_back(A[r]);}s.pop_front();}printf("%llu\n", ans);return 0;}