結果
問題 | No.4 おもりと天秤 |
ユーザー | OmameBeans |
提出日時 | 2021-12-28 11:23:05 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 7 ms / 5,000 ms |
コード長 | 2,845 bytes |
コンパイル時間 | 1,758 ms |
コンパイル使用メモリ | 172,488 KB |
実行使用メモリ | 7,680 KB |
最終ジャッジ日時 | 2024-10-02 01:58:10 |
合計ジャッジ時間 | 2,987 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 5 ms
7,552 KB |
testcase_01 | AC | 5 ms
7,552 KB |
testcase_02 | AC | 6 ms
7,552 KB |
testcase_03 | AC | 5 ms
7,552 KB |
testcase_04 | AC | 5 ms
7,552 KB |
testcase_05 | AC | 7 ms
7,552 KB |
testcase_06 | AC | 5 ms
7,552 KB |
testcase_07 | AC | 7 ms
7,552 KB |
testcase_08 | AC | 7 ms
7,552 KB |
testcase_09 | AC | 6 ms
7,552 KB |
testcase_10 | AC | 7 ms
7,680 KB |
testcase_11 | AC | 5 ms
7,552 KB |
testcase_12 | AC | 5 ms
7,680 KB |
testcase_13 | AC | 5 ms
7,552 KB |
testcase_14 | AC | 5 ms
7,680 KB |
testcase_15 | AC | 5 ms
7,552 KB |
testcase_16 | AC | 5 ms
7,552 KB |
testcase_17 | AC | 5 ms
7,552 KB |
testcase_18 | AC | 7 ms
7,424 KB |
testcase_19 | AC | 7 ms
7,680 KB |
testcase_20 | AC | 7 ms
7,424 KB |
testcase_21 | AC | 7 ms
7,552 KB |
testcase_22 | AC | 7 ms
7,680 KB |
ソースコード
#include <bits/stdc++.h> #define REP(i,n) for (int i = 0; i < (n); ++i) template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b;return true;}return false;} template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b;return true;}return false;} using namespace std; using ll = long long; using P = pair<int,int>; using Pl = pair<long long,long long>; using veci = vector<int>; using vecl = vector<long long>; using vecveci = vector<vector<int>>; using vecvecl = vector<vector<long long>>; const int MOD = 1000000007; const double pi = acos(-1); ll gcd(ll a, ll b) {if(b == 0) return a; else return gcd(b,a%b);} ll lcm(ll a, ll b) {return a*b/gcd(a,b);} template<int MOD> struct Fp { long long val; constexpr Fp(long long v = 0) noexcept : val(v % MOD) {if (val < 0) val += MOD;} constexpr int getmod() { return MOD; } constexpr Fp operator - () const noexcept {return val ? MOD - val : 0;} constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; } constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; } constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; } constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; } constexpr Fp& operator += (const Fp& r) noexcept {val += r.val;if (val >= MOD) val -= MOD;return *this;} constexpr Fp& operator -= (const Fp& r) noexcept {val -= r.val;if (val < 0) val += MOD;return *this;} constexpr Fp& operator *= (const Fp& r) noexcept {val = val * r.val % MOD;return *this;} constexpr Fp& operator /= (const Fp& r) noexcept {long long a = r.val, b = MOD, u = 1, v = 0;while (b) {long long t = a / b;a -= t * b; swap(a, b);u -= t * v; swap(u, v);}val = val * u % MOD;if (val < 0) val += MOD;return *this;} constexpr bool operator == (const Fp& r) const noexcept {return this->val == r.val;} constexpr bool operator != (const Fp& r) const noexcept {return this->val != r.val;} friend constexpr ostream& operator << (ostream &os, const Fp<MOD>& x) noexcept {return os << x.val;} friend constexpr Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept {if (n == 0) return 1;auto t = modpow(a, n / 2);t = t * t;if (n & 1) t = t * a;return t;} }; using mint = Fp<MOD>; int main() { int N; cin >> N; veci W(N); REP(i,N) cin >> W[i]; vecveci dp(110,veci(10010)); dp[0][0] = 1; int S = 0; REP(i,N) { S += W[i]; REP(j,10010) { if(j+W[i] < 10010) dp[i+1][j+W[i]] |= dp[i][j]; dp[i+1][j] |= dp[i][j]; } } // REP(i,N+1) { // REP(j,S+1) cout << dp[i][j] << " "; // cout << endl; // } if(S%2 != 0) cout << "impossible" << endl; else { if(dp[N][S/2]) cout << "possible" << endl; else cout << "impossible" << endl; } }