oj.uz

답안 #113707

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
113707 2019-05-28T01:44:13 Z thebes Cities (BOI16_cities) C++14
74 / 100
 6000 ms 205124 KB 
#include <bits/stdc++.h>
using namespace std;

const int MN = 1e5+5;
typedef long long ll;
typedef pair<ll,ll> pii;
struct reeee{int n, m; ll d;};

bool ww[MN][1<<6];
ll n, m, k, i, x, y, w, vs[MN][1<<6], ans = 1LL<<60;
vector<pii> adj[MN]; vector<ll> heh;
struct pq{bool operator()(const reeee&i,const reeee&j){return i.d>j.d;}};
priority_queue<reeee,vector<reeee>,pq> q;

int main(){
    for(scanf("%lld%lld%lld",&n,&k,&m),i=1;i<=k;i++){
        scanf("%lld",&x);
        heh.push_back(x);
    }
    for(i=1;i<=m;i++){
        scanf("%lld%lld%lld",&x,&y,&w);
        adj[x].push_back({y,w});
        adj[y].push_back({x,w});
    }
    memset(vs,0x3f,sizeof(vs));
    for(i=0;i<heh.size();i++)
        q.push({heh[i], 1<<i, 0});
    while(q.size()){
        auto v = q.top(); q.pop();
        if(v.m==(1<<k)-1) ans = min(ans, v.d);
        if(ww[v.n][v.m]) continue;
        vs[v.n][v.m] = v.d;
        ww[v.n][v.m] = 1;
        for(int mm=0;mm<(1<<k);mm++){
            if(v.d+vs[v.n][mm]<vs[v.n][v.m|mm]){
                vs[v.n][v.m|mm]=v.d+vs[v.n][mm];
                q.push({v.n, v.m|mm, v.d+vs[v.n][mm]});
            }
        }
        for(auto w : adj[v.n]){
            if(v.d+w.second<vs[w.first][v.m]){
                vs[w.first][v.m]=v.d+w.second;
                q.push({w.first, v.m, v.d+w.second});
            }
        }
    }
    printf("%lld\n",ans);
    return 0;
}

Compilation message

cities.cpp: In function 'int main()':
cities.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<heh.size();i++)
             ~^~~~~~~~~~~
cities.cpp:27:33: warning: narrowing conversion of 'heh.std::vector<long long int>::operator[](((std::vector<long long int>::size_type)i))' from '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' to 'int' inside { } [-Wnarrowing]
         q.push({heh[i], 1<<i, 0});
                                 ^
cities.cpp:43:27: warning: narrowing conversion of 'w.std::pair<long long int, long long int>::first' from 'long long int' to 'int' inside { } [-Wnarrowing]
                 q.push({w.first, v.m, v.d+w.second});
                         ~~^~~~~
cities.cpp:16:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(scanf("%lld%lld%lld",&n,&k,&m),i=1;i<=k;i++){
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
cities.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&x);
         ~~~~~^~~~~~~~~~~
cities.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld",&x,&y,&w);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 52728 KB Output is correct
2 Correct 39 ms 52856 KB Output is correct
3 Correct 39 ms 52832 KB Output is correct
4 Correct 39 ms 52856 KB Output is correct
5 Correct 41 ms 52768 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1086 ms 86020 KB Output is correct
2 Correct 940 ms 76896 KB Output is correct
3 Correct 540 ms 68620 KB Output is correct
4 Correct 141 ms 62196 KB Output is correct
5 Correct 497 ms 73748 KB Output is correct
6 Correct 128 ms 61980 KB Output is correct
7 Correct 43 ms 53156 KB Output is correct
8 Correct 42 ms 52984 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 48 ms 53624 KB Output is correct
2 Correct 48 ms 53368 KB Output is correct
3 Correct 43 ms 53112 KB Output is correct
4 Correct 45 ms 53368 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2950 ms 102536 KB Output is correct
2 Correct 2570 ms 101608 KB Output is correct
3 Correct 1864 ms 81124 KB Output is correct
4 Correct 1627 ms 99556 KB Output is correct
5 Correct 371 ms 70676 KB Output is correct
6 Correct 153 ms 64536 KB Output is correct

Subtask #5
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 6085 ms 205124 KB Time limit exceeded
2 Halted 0 ms 0 KB -