結果
| 問題 | No.4 おもりと天秤 | 
| コンテスト | |
| ユーザー |  | 
| 提出日時 | 2018-05-12 13:29:42 | 
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 6 ms / 5,000 ms | 
| コード長 | 2,447 bytes | 
| コンパイル時間 | 744 ms | 
| コンパイル使用メモリ | 73,860 KB | 
| 実行使用メモリ | 7,652 KB | 
| 最終ジャッジ日時 | 2024-06-28 09:34:14 | 
| 合計ジャッジ時間 | 1,579 ms | 
| ジャッジサーバーID (参考情報) | judge4 / judge3 | 
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| ファイルパターン | 結果 | 
|---|---|
| other | AC * 23 | 
ソースコード
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
template<class T> inline void YES(T condition){ if(condition) cout << "YES" << endl; else cout << "NO" << endl; }
template<class T> inline void Yes(T condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }
template<class T> inline void POSS(T condition){ if(condition) cout << "POSSIBLE" << endl; else cout << "IMPOSSIBLE" << endl; }
template<class T> inline void Poss(T condition){ if(condition) cout << "Possible" << endl; else cout << "Impossible" << endl; }
template<class T> inline void First(T condition){ if(condition) cout << "First" << endl; else cout << "Second" << endl; }
int character_count(string text, char character){ int ans = 0; for(int i = 0; i < text.size(); i++){ ans += (text[i] == character); } return ans; }
long power(long base, long exponent, long module){ if(exponent % 2){ return power(base, exponent - 1, module) * base % module; }else if(exponent){ long root_ans = power(base, exponent / 2, module); return root_ans * root_ans % module; }else{ return 1; }}
struct position{ int y, x; }; position move_pattern[4] = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}}; // double euclidean(position first, position second){ return sqrt((second.x - first.x) * (second.x - first.x) + (second.y - first.y) * (second.y - first.y)); }
template<class itr> void array_output(itr start, itr goal){ string ans; for(auto i = start; i != goal; i++){ ans += to_string(*i) + " "; } ans.pop_back(); cout << ans << endl; }
long gcd(long a, long b){ if(a && b){ return gcd(min(a, b), max(a, b) % min(a, b)); }else{ return a; }}
#define mod long(1e9 + 7)
#define all(x) (x).begin(), (x).end()
#define bitcount(n) __builtin_popcountl(long(n))
int N;
vector<int> weight;
int weight_sum = 0;
int dp[103][10003];
bool choose(int now, int sum){
    if(now == N){
        return sum * 2 == weight_sum;
    }else if(dp[now][sum] != -1){
        return dp[now][sum];
    }else{
        return dp[now][sum] = (choose(now + 1, sum) || choose(now + 1, sum + weight[now]));
    }
}
int main(){
    cin >> N;
    weight.resize(N);
    for(int i = 0; i < N; i++){
        cin >> weight[i];
        weight_sum += weight[i];
    }
    for(int i = 0; i < 103; i++){
        for(int j = 0; j < 10003; j++){
            dp[i][j] = -1;
        }
    }
    if(choose(0, 0)){
        cout << "possible" << endl;
    }else{
        cout << "impossible" << endl;
    }
}
            
            
            
        