結果

問題 No.17 2つの地点に泊まりたい
ユーザー mai(舞葉)
提出日時 2017-05-17 23:03:03
言語 C++17(1z)
(gcc 7.1.0)
結果
AC  
実行時間 4 ms
コード長 4193 Byte
コンパイル時間 2500 ms
使用メモリ 1488 KB

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
01.txt AC 2 ms
1472 KB
02.txt AC 3 ms
1472 KB
03.txt AC 2 ms
1476 KB
04.txt AC 3 ms
1484 KB
05.txt AC 2 ms
1476 KB
06.txt AC 3 ms
1480 KB
07.txt AC 3 ms
1480 KB
08.txt AC 2 ms
1476 KB
09.txt AC 4 ms
1488 KB
10.txt AC 4 ms
1484 KB
challenge01.txt AC 2 ms
1468 KB
system_test1.txt AC 2 ms
1468 KB
system_test2.txt AC 4 ms
1472 KB
system_test3.txt AC 3 ms
1468 KB
system_test4.txt AC 3 ms
1468 KB
system_test5.txt AC 3 ms
1472 KB
system_test6.txt AC 2 ms
1484 KB
system_test7.txt AC 2 ms
1480 KB
system_test8.txt AC 3 ms
1480 KB
system_test9.txt AC 3 ms
1476 KB
system_test10.txt AC 4 ms
1484 KB
system_test11.txt AC 3 ms
1484 KB
system_test12.txt AC 2 ms
1476 KB
system_test13.txt AC 3 ms
1472 KB
system_test14.txt AC 3 ms
1484 KB
テストケース一括ダウンロード

ソースコード

diff #
#pragma GCC optimize ("O3")
#pragma GCC target ("avx")
#include "bits/stdc++.h" // define macro "/D__MAI"

using namespace std;
typedef unsigned int uint;
typedef long long int ll;
typedef unsigned long long int ull;

#define debugv(v) printf("L%d %s => ",__LINE__,#v);for(auto e:v){cout<<e<<" ";}cout<<endl;
#define debugm(m) printf("L%d %s is..\n",__LINE__,#m);for(auto v:m){for(auto e:v){cout<<e<<" ";}cout<<endl;}
#define debuga(m,w) printf("L%d %s is => ",__LINE__,#m);for(int x=0;x<(w);x++){cout<<(m)[x]<<" ";}cout<<endl;
#define debugaa(m,w,h) printf("L%d %s is..\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[x][y]<<" ";}cout<<endl;}
#define debugaar(m,w,h) printf("L%d %s is..\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[y][x]<<" ";}cout<<endl;}
#define ALL(v) (v).begin(),(v).end()
#define repeat(l) for(auto cnt=0;cnt<(l);++cnt)
#define upto(l,r) for(auto cnt=l;cnt<=r;++cnt)
#define downto(r,l) for(auti cnt=r;cnt>=l;--cnt)
#define BIGINT 0x7FFFFFFF
#define MD 1000000007ll
#define PI 3.1415926535897932384626433832795
template<typename T1, typename T2>
ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << "(" << p.first << ":" << p.second << ")"; return o; }

#define TIME chrono::system_clock::now()
#define MILLISEC(t) (chrono::duration_cast<chrono::milliseconds>(t).count())
namespace {
    std::chrono::system_clock::time_point ttt;
    void tic() { ttt = TIME; }
    void toc() { fprintf(stderr, "TIME : %lldms\n", MILLISEC(TIME - ttt)); }
    std::chrono::system_clock::time_point tle = TIME;
#ifdef __MAI
    void safe_tle(int msec) { assert(MILLISEC(TIME - tle) < msec); }
#else
#define safe_tle(k) ;
#endif
}

#ifdef __MAI //_getchar_nolock
#define getchar_unlocked getchar
#endif
namespace {
    class MaiScanner {
    public:
        template<typename T>
        void input_integer(T& var) {
            var = 0;
            T sign = 1;
            int cc = getchar_unlocked();
            for (; cc<'0' || '9'<cc; cc = getchar_unlocked())
                if (cc == '-') sign = -1;
            for (; '0' <= cc&&cc <= '9'; cc = getchar_unlocked())
                var = (var << 3) + (var << 1) + cc - '0';
            var = var*sign;
        }
        inline int c() { return getchar_unlocked(); }
        inline MaiScanner& operator>>(int& var) {
            input_integer<int>(var);
            return *this;
        }
        inline MaiScanner& operator>>(long long& var) {
            input_integer<long long>(var);
            return *this;
        }
    };
}
MaiScanner scanner;


// 隣接行列を保持するグラフ
class Graph2d {
public:
    size_t n;
    vector<int> matrix;

    Graph2d(size_t size) :n(size), matrix(size*size) {};

    void resize(size_t s) {
        n = s;
        matrix.resize(n*n);
    }

    inline int& at(int y, int x) { return matrix[y*n + x]; }
    inline int& operator()(int y, int x) { return matrix[y*n + x]; }
    inline int at(int y, int x) const { return matrix[y*n + x]; }
    inline int operator()(int y, int x) const { return matrix[y*n + x]; }

    inline void connect(int u, int v, int dist = 1) {
        at(u, v) = at(v, u) = dist;
    }
    inline void connect_d(int u, int v, int dist = 1) { // directedEdge u->v
        at(u, v) = dist;
    }

};

void warshall_floyd(Graph2d& g) {
    int i, j, k;
    for (i = 0; i < g.n; i++) {
        for (j = 0; j < g.n; j++) {
            for (k = 0; k < g.n; k++) {
                g(j, k) = min(g(j, k), g(j, i) + g(i, k));
            }
        }
    }
}


int n, m;

int ss[100];

int main() {
    scanner >> n;

    repeat(n) {
        scanner >> ss[cnt];
    }

    scanner >> m;

    Graph2d graph(n);
    fill(ALL(graph.matrix), 98989898);

    int a, b, c;
    repeat(m) {
        scanner >> a >> b >> c;
        graph.connect(a, b, c);
    }

    warshall_floyd(graph);

    int result = 98989898;
    for (int u = 1; u < n - 1; ++u) {
        for (int v = 1; v < n - 1; ++v) {
            if (u == v) continue;
            result = min(result,
                graph(0, v) + graph(v, u) + graph(u, n - 1) + ss[v] + ss[u]
            );
        }
    }

    cout << result << endl;

    return 0;
}
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