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답안 #148108

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
148108 2019-08-31T13:56:58 Z WhipppedCream Toll (BOI17_toll) C++17
100 / 100
 450 ms 19472 KB 
#include <bits/stdc++.h>
#define ii pair<int, int>
#define X first
#define Y second
#define pb push_back
#define mp make_pair
#define vi vector<int>
#define vii vector< pair<int, int> >
typedef long long ll;
using namespace std;
int K;
vector< vector< vector<int> > >  mat;
vector< vector<int> > iden;
vii adj[50005];
struct node
{
    vector< vector<int> > dat;
    node *left, *right;
    node(){}
    node(vector< vector<int> > want, node *A, node *B)
    {
        dat.assign(K, vi(K, 0));
        dat = want;
        left = A, right = B;
    }
};
node* build(int L, int R)
{
    if(L == R) return new node(mat[L], NULL, NULL);
    node* res = new node(vector< vector<int> >(K, vi(K, 0)), NULL, NULL);
    res->left = build(L, (L+R)/2);
    res->right = build((L+R)/2+1, R);
    for(int i = 0; i< K; i++)
    {
        for(int j = 0; j< K; j++)
        {
            int best = 1e9;
            for(int k = 0; k< K; k++)
            {
                best = min(best, res->left->dat[i][k]+res->right->dat[k][j]);
            }
            res->dat[i][j] = best;
        }
    }
    return res;
}
node query(node* p, int L, int R, int i, int j)
{
    //printf("it's %d %d %d %d\n", L, R, i, j);
    if(i> R || j< L) return node(iden, NULL, NULL);
    if(i<= L && R<= j) return *p;
    node res(vector< vi >(K, vi(K, 0)), NULL, NULL);
    node x = query(p->left, L, (L+R)/2, i, j);
    node y = query(p->right, (L+R)/2+1, R, i, j);
    //printf("here for %d %d\n", L, R);
    for(int i = 0; i< K; i++)
    {
        for(int j = 0; j< K; j++)
        {
            int best = 1e9;
            for(int k = 0; k< K; k++)
            {
                best = min(best, x.dat[i][k]+y.dat[k][j]);
            }
            res.dat[i][j] = best;
        }
    }
    return res;
}
int main()
{
    int n, m, q;
    scanf("%d %d %d %d", &K, &n, &m, &q);
    mat.assign(n/K+1, vector< vector<int> >(K, vi(K, 1e9)));
    for(int i = 0; i< m; i++)
    {
        int a, b, w; scanf("%d %d %d", &a, &b, &w);
        adj[a].pb(ii(b, w));
        mat[a/K][a%K][b%K] = min(mat[a/K][a%K][b%K], w);
    }
    iden.assign(K, vi(K, 1e9));
    for(int i = 0; i< K; i++) iden[i][i] = 0;
    node *root = build(0, (n-1)/K-1);
    //printf("ok\n");
    while(q--)
    {
        int x, y; scanf("%d %d", &x, &y);
        //kprintf("hihi\n");
        if(x == y)
        {
            printf("0\n"); continue;
        }
        if(x> y) swap(x, y);
        int x1 = x/K, x2 = x%K;
        int y1 = y/K, y2 = y%K;
        if(x1 == y1)
        {
            printf("-1\n"); continue;
        }
        node tmp = query(root, 0, (n-1)/K-1, x1, y1-1);
        //printf("%d %d\n", x2, y2);
        int res = tmp.dat[x2][y2];
        if(res == 1e9) printf("-1\n");
        else printf("%d\n", res);
        /*
        vector< vector<int>
         > ans(K, vi(K, 0));
        for(int p = x1; p< y1; p++)
        {
            vector< vector<int> > rub(K, vi(K, 1e9));
            for(int i = 0; i< K; i++)
            {
                for(int j = 0; j< K; j++)
                {
                    for(int k = 0; k< K; k++)
                    {
                        rub[i][j] = min(rub[i][j], ans[i][k]+mat[p][k][j]);
                    }
                }
            }
            for(int i = 0; i< K; i++)
            {
                for(int j = 0; j< K; j++)
                {
                    printf("%d ", rub[i][j]);
                }
                printf("\n");
            }
            for(int i = 0; i< K; i++) for(int j = 0; j< K; j++) ans[i][j] = rub[i][j];
        }
        int res = ans[x2][y2];
        if(res == 1e9) printf("-1\n");
        else printf("%d\n", res);
        */
    }
    return 0;
}

Compilation message

toll.cpp: In function 'int main()':
toll.cpp:73:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &K, &n, &m, &q);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:77:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int a, b, w; scanf("%d %d %d", &a, &b, &w);
                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:87:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int x, y; scanf("%d %d", &x, &y);
                   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 19472 KB Output is correct
2 Correct 3 ms 1540 KB Output is correct
3 Correct 3 ms 1524 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 12 ms 1804 KB Output is correct
6 Correct 12 ms 1912 KB Output is correct
7 Correct 12 ms 1784 KB Output is correct
8 Correct 228 ms 19316 KB Output is correct
9 Correct 230 ms 19308 KB Output is correct
10 Correct 188 ms 16988 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 214 ms 17140 KB Output is correct
2 Correct 3 ms 1528 KB Output is correct
3 Correct 3 ms 1528 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 3 ms 1528 KB Output is correct
6 Correct 3 ms 1528 KB Output is correct
7 Correct 47 ms 2040 KB Output is correct
8 Correct 58 ms 1920 KB Output is correct
9 Correct 161 ms 19244 KB Output is correct
10 Correct 250 ms 16620 KB Output is correct
11 Correct 205 ms 17296 KB Output is correct
12 Correct 194 ms 15012 KB Output is correct
13 Correct 166 ms 12160 KB Output is correct
14 Correct 116 ms 10844 KB Output is correct
15 Correct 116 ms 9720 KB Output is correct
16 Correct 122 ms 9740 KB Output is correct

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1528 KB Output is correct
2 Correct 3 ms 1528 KB Output is correct
3 Correct 3 ms 1528 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 3 ms 1528 KB Output is correct
6 Correct 5 ms 1784 KB Output is correct
7 Correct 5 ms 1784 KB Output is correct
8 Correct 7 ms 1756 KB Output is correct
9 Correct 6 ms 1784 KB Output is correct
10 Correct 86 ms 19064 KB Output is correct
11 Correct 110 ms 16972 KB Output is correct
12 Correct 125 ms 16504 KB Output is correct
13 Correct 127 ms 17016 KB Output is correct
14 Correct 106 ms 15736 KB Output is correct
15 Correct 66 ms 9720 KB Output is correct
16 Correct 66 ms 9592 KB Output is correct

Subtask #4
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 1528 KB Output is correct
2 Correct 3 ms 1528 KB Output is correct
3 Correct 3 ms 1528 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 3 ms 1528 KB Output is correct
6 Correct 5 ms 1784 KB Output is correct
7 Correct 5 ms 1784 KB Output is correct
8 Correct 7 ms 1756 KB Output is correct
9 Correct 6 ms 1784 KB Output is correct
10 Correct 86 ms 19064 KB Output is correct
11 Correct 110 ms 16972 KB Output is correct
12 Correct 125 ms 16504 KB Output is correct
13 Correct 127 ms 17016 KB Output is correct
14 Correct 106 ms 15736 KB Output is correct
15 Correct 66 ms 9720 KB Output is correct
16 Correct 66 ms 9592 KB Output is correct
17 Correct 151 ms 17108 KB Output is correct
18 Correct 3 ms 1528 KB Output is correct
19 Correct 3 ms 1528 KB Output is correct
20 Correct 3 ms 1528 KB Output is correct
21 Correct 3 ms 1572 KB Output is correct
22 Correct 3 ms 1528 KB Output is correct
23 Correct 26 ms 1912 KB Output is correct
24 Correct 32 ms 1868 KB Output is correct
25 Correct 51 ms 1912 KB Output is correct
26 Correct 43 ms 1860 KB Output is correct
27 Correct 128 ms 19328 KB Output is correct
28 Correct 193 ms 16760 KB Output is correct
29 Correct 203 ms 17016 KB Output is correct
30 Correct 170 ms 15784 KB Output is correct

Subtask #5
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 19472 KB Output is correct
2 Correct 3 ms 1540 KB Output is correct
3 Correct 3 ms 1524 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 12 ms 1804 KB Output is correct
6 Correct 12 ms 1912 KB Output is correct
7 Correct 12 ms 1784 KB Output is correct
8 Correct 228 ms 19316 KB Output is correct
9 Correct 230 ms 19308 KB Output is correct
10 Correct 188 ms 16988 KB Output is correct
11 Correct 214 ms 17140 KB Output is correct
12 Correct 3 ms 1528 KB Output is correct
13 Correct 3 ms 1528 KB Output is correct
14 Correct 3 ms 1528 KB Output is correct
15 Correct 3 ms 1528 KB Output is correct
16 Correct 3 ms 1528 KB Output is correct
17 Correct 47 ms 2040 KB Output is correct
18 Correct 58 ms 1920 KB Output is correct
19 Correct 161 ms 19244 KB Output is correct
20 Correct 250 ms 16620 KB Output is correct
21 Correct 205 ms 17296 KB Output is correct
22 Correct 194 ms 15012 KB Output is correct
23 Correct 166 ms 12160 KB Output is correct
24 Correct 116 ms 10844 KB Output is correct
25 Correct 116 ms 9720 KB Output is correct
26 Correct 122 ms 9740 KB Output is correct
27 Correct 4 ms 1528 KB Output is correct
28 Correct 3 ms 1528 KB Output is correct
29 Correct 3 ms 1528 KB Output is correct
30 Correct 3 ms 1528 KB Output is correct
31 Correct 3 ms 1528 KB Output is correct
32 Correct 5 ms 1784 KB Output is correct
33 Correct 5 ms 1784 KB Output is correct
34 Correct 7 ms 1756 KB Output is correct
35 Correct 6 ms 1784 KB Output is correct
36 Correct 86 ms 19064 KB Output is correct
37 Correct 110 ms 16972 KB Output is correct
38 Correct 125 ms 16504 KB Output is correct
39 Correct 127 ms 17016 KB Output is correct
40 Correct 106 ms 15736 KB Output is correct
41 Correct 66 ms 9720 KB Output is correct
42 Correct 66 ms 9592 KB Output is correct
43 Correct 151 ms 17108 KB Output is correct
44 Correct 3 ms 1528 KB Output is correct
45 Correct 3 ms 1528 KB Output is correct
46 Correct 3 ms 1528 KB Output is correct
47 Correct 3 ms 1572 KB Output is correct
48 Correct 3 ms 1528 KB Output is correct
49 Correct 26 ms 1912 KB Output is correct
50 Correct 32 ms 1868 KB Output is correct
51 Correct 51 ms 1912 KB Output is correct
52 Correct 43 ms 1860 KB Output is correct
53 Correct 128 ms 19328 KB Output is correct
54 Correct 193 ms 16760 KB Output is correct
55 Correct 203 ms 17016 KB Output is correct
56 Correct 170 ms 15784 KB Output is correct
57 Correct 450 ms 17692 KB Output is correct
58 Correct 228 ms 19404 KB Output is correct
59 Correct 287 ms 17320 KB Output is correct