結果
問題 | No.910 素数部分列 |
ユーザー |
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提出日時 | 2019-11-01 18:32:38 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 7 ms / 1,000 ms |
コード長 | 2,625 bytes |
コンパイル時間 | 1,191 ms |
コンパイル使用メモリ | 121,540 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-14 22:48:24 |
合計ジャッジ時間 | 2,711 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 50 |
ソースコード
#include <algorithm>#include <bitset>#include <complex>#include <deque>#include <exception>#include <fstream>#include <functional>#include <iomanip>#include <ios>#include <iosfwd>#include <iostream>#include <istream>#include <iterator>#include <limits>#include <list>#include <locale>#include <map>#include <memory>#include <new>#include <numeric>#include <ostream>#include <queue>#include <set>#include <sstream>#include <stack>#include <stdexcept>#include <streambuf>#include <string>#include <typeinfo>#include <utility>#include <valarray>#include <vector>#include <climits>#include <cstring>#define rep(i, m, n) for(int i=int(m);i<int(n);i++)#define all(c) begin(c),end(c)template<typename T1, typename T2>inline void chmin(T1 &a, T2 b) { if (a > b) a = b; }template<typename T1, typename T2>inline void chmax(T1 &a, T2 b) { if (a < b) a = b; }typedef long long int ll;using ll = long long int;using ull = long long unsigned int;using Int = long long int;using namespace std;#define INF (1 << 30) - 1#define INFl (ll)5e15#define DEBUG 0#define dump(x) cerr << #x << " = " << (x) << endl#define MOD 1000000007//editclass Solve {public:void solve() {Int N;cin >> N;string S;cin >> S;vector<bool> used(N, false);int ans = 0;for (int i = 0; i < N; ++i) {if (S[i] == '3' or S[i] == '5' or S[i] == '7') {ans++;used[i] = true;}}stack<int> st;for (int i = 0; i < N; ++i) {if (!used[i]) {if (st.empty()) {st.push(i);} else {if (S[st.top()] == '1' && S[i] == '9') {used[st.top()] = true;used[i] = true;st.pop();ans++;} else {st.push(i);}}}}int c1 = 0, c9 = 0;for (int i = 0; i < N; ++i) {if (!used[i]) {if (S[i] == '1') c1++;else c9++;}}{int dec = min(c9 / 2, c1);c1 -= dec;c9 -= dec * 2;ans += dec;}{int dec = c1 / 2;ans += dec;}cout << ans << endl;}};int main() {cin.tie(0);ios::sync_with_stdio(false);cout << fixed << setprecision(10);Solve().solve();return 0;}