oj.uz

답안 #113716

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
113716 2019-05-28T02:14:35 Z thebes Cities (BOI16_cities) C++14
100 / 100
 5440 ms 204372 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){
        	printf("%lld\n",v.d);
          	return 0;
        }
        if(ww[v.n][v.m]) continue;
        vs[v.n][v.m] = v.d;
        ww[v.n][v.m] = 1;
        for(int mm=(1<<k);mm;mm=((mm-1)&(~v.m))){
            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});
            }
        }
    }
    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:46:27: 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 39 ms 52728 KB Output is correct
2 Correct 40 ms 52864 KB Output is correct
3 Correct 42 ms 52856 KB Output is correct
4 Correct 44 ms 52860 KB Output is correct
5 Correct 40 ms 52920 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 657 ms 86032 KB Output is correct
2 Correct 639 ms 76828 KB Output is correct
3 Correct 192 ms 65548 KB Output is correct
4 Correct 139 ms 62196 KB Output is correct
5 Correct 339 ms 73656 KB Output is correct
6 Correct 122 ms 62028 KB Output is correct
7 Correct 42 ms 53112 KB Output is correct
8 Correct 41 ms 52940 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 53600 KB Output is correct
2 Correct 46 ms 53400 KB Output is correct
3 Correct 42 ms 53112 KB Output is correct
4 Correct 43 ms 53368 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2067 ms 102300 KB Output is correct
2 Correct 1681 ms 101444 KB Output is correct
3 Correct 1140 ms 80864 KB Output is correct
4 Correct 1120 ms 99404 KB Output is correct
5 Correct 236 ms 70608 KB Output is correct
6 Correct 140 ms 64596 KB Output is correct

Subtask #5
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5440 ms 200960 KB Output is correct
2 Correct 5423 ms 200960 KB Output is correct
3 Correct 5168 ms 204372 KB Output is correct
4 Correct 2439 ms 132332 KB Output is correct
5 Correct 3279 ms 136344 KB Output is correct
6 Correct 585 ms 82876 KB Output is correct
7 Correct 184 ms 69632 KB Output is correct