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Submission #585159

# Submission time Handle Problem Language Result Execution time Memory
585159 2022-06-28T11:14:43 Z Huy Toll (BOI17_toll) C++17
100 / 100
 373 ms 62136 KB 
#include<bits/stdc++.h>
//#define int long long
#define pii pair<int,ll>
#define fi first
#define se second
/*#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")*/
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ldb = long double;
const ll N = (int)1e9 + 1;
const int maxN = (int)5e4 + 5;
const int mod = 1e9 + 7;
//const int mod = 998244353;
const int infty = 1e15 + 7;
const int base = (int)4e5;

void InputFile()
{
    //freopen("scrivener.inp","r",stdin);
    //freopen("scrivener.out","w",stdout);
    //freopen("test.out","r",stdin);
}

void FastInput()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int k,n,m,o;
ll f[maxN][17][5];
ll jump[maxN][5];
int grp;
map<pii,int> edg;

void Read()
{
    cin >> k >> n >> m >> o;
    for(int i = 1;i <= m;i++)
    {
        int a,b,t;
        cin >> a >> b >> t;
        edg[{a,b}] = edg[{b,a}] = t;
    }
}

void Solve()
{
    for(int i = n - 1;i >= 0;i--)
    {
        /// j = 0;
        for(int d = 0;d < k;d++)
        {
            int nxt = (i / k + 1) * k + d;
            if(edg.find(make_pair(i,nxt)) == edg.end()) f[i][0][d] = infty;
            else f[i][0][d] = edg[{i,nxt}];
        }

        for(int j = 1;j <= (int)log2(n);j++)
        {
            for(int d = 0;d < k;d++)
            {
                f[i][j][d] = infty;
                for(int d1 = 0;d1 < k;d1++) /// pre d
                {
                    int nxt = (i / k + (1<<(j-1))) * k + d1;
                    if(nxt <= n) f[i][j][d] = min(f[i][j][d],f[nxt][j-1][d] + f[i][j-1][d1]);
                    else
                    {
                        f[i][j][d] = min(f[i][j][d],f[i][j-1][d1]);
                    }
                }
            }
        }
    }

    while(o--)
    {
        int x,y;
        cin >> x >> y;
        if(x > y) cout << -1 <<'\n';
        else if(x / k == y / k)
        {
            if(x == y) cout << 0 <<'\n';
            else cout << -1 <<'\n';
        }
        else
        {
            int dis = y / k - x / k;
            int pre = x / k;
            for(int i = (int)log2(n);i >= 0;i--)
            {
                if(dis & (1 << i))
                {
                    int nxt = pre + (1 << i);
                    if(pre == x/k)
                    {
                        for(int d = 0;d < k;d++)
                        {
                            jump[nxt][d] = f[x][i][d];
                        }
                    }
                    else
                    {
                        for(int d = 0;d < k;d++)
                        {
                            jump[nxt][d] = infty;
                            for(int d1 = 0;d1 < k;d1++)
                            {
                                jump[nxt][d] = min(jump[nxt][d],jump[pre][d1]+f[pre*k+d1][i][d]);
                            }
                        }
                    }
                    pre = nxt;
                }
            }
            int res = jump[y/k][y%k];
            if(res >= infty) res = -1;
            cout << res <<'\n';
        }
    }

    //cout <<"dcme"<<' '<< f[4][0][2] <<' '<<'\n';
}

void Debug()
{

}


int32_t main()
{
    FastInput();
    //InputFile();
    //int sub_type;
    //cin >> sub_type;
    //Sieve();
    //Prepare();
    int test;
    //cin >> test;
    test = 1;
    while(test--)
        //for(int prc = 1; prc <= test; prc++)
    {
        Read();
        Solve();
        //Debug();
    }
}

Compilation message

toll.cpp:19:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.000000000000007e+15' to '2147483647' [-Woverflow]
   19 | const int infty = 1e15 + 7;
      |                   ~~~~~^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 41836 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 2 ms 1044 KB Output is correct
6 Correct 2 ms 1108 KB Output is correct
7 Correct 2 ms 1108 KB Output is correct
8 Correct 78 ms 41804 KB Output is correct
9 Correct 76 ms 41492 KB Output is correct
10 Correct 32 ms 35472 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 145 ms 46408 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 5 ms 1248 KB Output is correct
8 Correct 6 ms 1364 KB Output is correct
9 Correct 80 ms 42644 KB Output is correct
10 Correct 239 ms 53456 KB Output is correct
11 Correct 170 ms 48848 KB Output is correct
12 Correct 137 ms 44900 KB Output is correct
13 Correct 258 ms 41584 KB Output is correct
14 Correct 151 ms 33380 KB Output is correct
15 Correct 137 ms 31160 KB Output is correct
16 Correct 124 ms 31004 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 1108 KB Output is correct
7 Correct 3 ms 1236 KB Output is correct
8 Correct 6 ms 1644 KB Output is correct
9 Correct 5 ms 1492 KB Output is correct
10 Correct 100 ms 41800 KB Output is correct
11 Correct 138 ms 47600 KB Output is correct
12 Correct 232 ms 53196 KB Output is correct
13 Correct 270 ms 55264 KB Output is correct
14 Correct 203 ms 49952 KB Output is correct
15 Correct 139 ms 30972 KB Output is correct
16 Correct 122 ms 31092 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 1108 KB Output is correct
7 Correct 3 ms 1236 KB Output is correct
8 Correct 6 ms 1644 KB Output is correct
9 Correct 5 ms 1492 KB Output is correct
10 Correct 100 ms 41800 KB Output is correct
11 Correct 138 ms 47600 KB Output is correct
12 Correct 232 ms 53196 KB Output is correct
13 Correct 270 ms 55264 KB Output is correct
14 Correct 203 ms 49952 KB Output is correct
15 Correct 139 ms 30972 KB Output is correct
16 Correct 122 ms 31092 KB Output is correct
17 Correct 148 ms 47912 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 3 ms 1108 KB Output is correct
24 Correct 4 ms 1236 KB Output is correct
25 Correct 5 ms 1492 KB Output is correct
26 Correct 5 ms 1492 KB Output is correct
27 Correct 93 ms 42496 KB Output is correct
28 Correct 225 ms 53360 KB Output is correct
29 Correct 265 ms 55444 KB Output is correct
30 Correct 185 ms 50168 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 41836 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 2 ms 1044 KB Output is correct
6 Correct 2 ms 1108 KB Output is correct
7 Correct 2 ms 1108 KB Output is correct
8 Correct 78 ms 41804 KB Output is correct
9 Correct 76 ms 41492 KB Output is correct
10 Correct 32 ms 35472 KB Output is correct
11 Correct 145 ms 46408 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 324 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 5 ms 1248 KB Output is correct
18 Correct 6 ms 1364 KB Output is correct
19 Correct 80 ms 42644 KB Output is correct
20 Correct 239 ms 53456 KB Output is correct
21 Correct 170 ms 48848 KB Output is correct
22 Correct 137 ms 44900 KB Output is correct
23 Correct 258 ms 41584 KB Output is correct
24 Correct 151 ms 33380 KB Output is correct
25 Correct 137 ms 31160 KB Output is correct
26 Correct 124 ms 31004 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 2 ms 1108 KB Output is correct
33 Correct 3 ms 1236 KB Output is correct
34 Correct 6 ms 1644 KB Output is correct
35 Correct 5 ms 1492 KB Output is correct
36 Correct 100 ms 41800 KB Output is correct
37 Correct 138 ms 47600 KB Output is correct
38 Correct 232 ms 53196 KB Output is correct
39 Correct 270 ms 55264 KB Output is correct
40 Correct 203 ms 49952 KB Output is correct
41 Correct 139 ms 30972 KB Output is correct
42 Correct 122 ms 31092 KB Output is correct
43 Correct 148 ms 47912 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 3 ms 1108 KB Output is correct
50 Correct 4 ms 1236 KB Output is correct
51 Correct 5 ms 1492 KB Output is correct
52 Correct 5 ms 1492 KB Output is correct
53 Correct 93 ms 42496 KB Output is correct
54 Correct 225 ms 53360 KB Output is correct
55 Correct 265 ms 55444 KB Output is correct
56 Correct 185 ms 50168 KB Output is correct
57 Correct 373 ms 62136 KB Output is correct
58 Correct 85 ms 42796 KB Output is correct
59 Correct 162 ms 48820 KB Output is correct