oj.uz

답안 #32141

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
32141 2017-09-27T20:18:15 Z imaxblue Cities (BOI16_cities) C++14
74 / 100
 4000 ms 235396 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define p3i pair<pii, int>
#define pll pair<ll, ll>
#define p3l pair<pll, ll>
#define lseg L, (L+R)/2, N*2+1
#define rseg (L+R)/2+1, R, N*2+2
#define ub upper_bound
#define lb lower_bound
#define pq priority_queue
#define MN 1000000007
#define fox(k, x) for (int k=0; k<x; ++k)
#define fox1(k, x) for (int k=1; k<=x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define fox1r(k, x) for (int k=x; k>0; --k)
#define ms multiset
#define flood(x) memset(x, 0x3f3f3f3f, sizeof x)
#define drain(x) memset(x, 0, sizeof x)
#define rng() (rand() >> 3)*rand()

int n, m, k, a, b, c, N, B;
ll dis[32][100005], D;
bool u[32][100005];
const ll t=(1LL << 60);
vector<pii> v[100005];
pq<pair<ll, int> > q;
int main(){
    scanf("%i%i%i", &n, &k, &m);
    fox(l, (1 << k)){
        fox1(l2, n) dis[l][l2]=1152921504606846976LL;
    }
    fox(l, k){
        scanf("%i", &a);
      	dis[1 << l][a]=0;
        q.push(mp(0, (1 << l) + (a << 5)));
    }
    fox(l, m){
        scanf("%i%i%i", &a, &b, &c);
        v[a].pb(mp(b, c));
        v[b].pb(mp(a, c));
    }
    while(!q.empty()){
        N=(q.top().y >> 5); D=-q.top().x; B=(q.top().y&31); q.pop();
        if (u[B][N]) continue;
        u[B][N]=1;
        //cout << N << ' ' << B << endl;
        if (B==(1 << k)-1){
            cout << D << endl;
            return 0;
        }
        fox(l, (1 << k)){
            if (dis[B|l][N]>D+dis[l][N]){
                dis[B|l][N]=D+dis[l][N];
                q.push(mp(-D-dis[l][N], (B|l)+(N << 5)));
            }
        }
        fox(l, v[N].size()){
            if (dis[B][v[N][l].x]>D+v[N][l].y){
                dis[B][v[N][l].x]=D+v[N][l].y;
                q.push(mp(-D-v[N][l].y, B+(v[N][l].x << 5)));
            }
        }
    }
    return 0;
}

Compilation message

cities.cpp: In function 'int main()':
cities.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fox(k, x) for (int k=0; k<x; ++k)
                                  ^
cities.cpp:63:9: note: in expansion of macro 'fox'
         fox(l, v[N].size()){
         ^
cities.cpp:34:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i%i", &n, &k, &m);
                                ^
cities.cpp:39:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i", &a);
                        ^
cities.cpp:44:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i%i%i", &a, &b, &c);
                                    ^

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 32484 KB Output is correct
2 Correct 0 ms 32484 KB Output is correct
3 Correct 0 ms 32484 KB Output is correct
4 Correct 0 ms 32484 KB Output is correct
5 Correct 0 ms 32484 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 729 ms 63368 KB Output is correct
2 Correct 656 ms 51012 KB Output is correct
3 Correct 169 ms 37228 KB Output is correct
4 Correct 106 ms 37700 KB Output is correct
5 Correct 259 ms 44932 KB Output is correct
6 Correct 103 ms 37292 KB Output is correct
7 Correct 0 ms 32752 KB Output is correct
8 Correct 3 ms 32616 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 33400 KB Output is correct
2 Correct 6 ms 33008 KB Output is correct
3 Correct 3 ms 32756 KB Output is correct
4 Correct 3 ms 33008 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2893 ms 87940 KB Output is correct
2 Correct 2336 ms 87860 KB Output is correct
3 Correct 1586 ms 60268 KB Output is correct
4 Correct 1386 ms 87448 KB Output is correct
5 Correct 216 ms 50028 KB Output is correct
6 Correct 109 ms 39416 KB Output is correct

Subtask #5
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4000 ms 235396 KB Execution timed out
2 Halted 0 ms 0 KB -