oj.uz

답안 #1115909

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1115909 2024-11-21T04:07:15 Z nathan4690 Toll (BOI17_toll) C++17
100 / 100
 142 ms 14408 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define el cout << '\n'
#define f1(i,n) for(int i=1;i<=n;i++)
#define __file_name ""
using namespace std;
const ll maxn = 5e4+5, inf=1e18;

struct Matrix{
    int r, c;
    vector<vector<ll>> data;
    Matrix(){};
    Matrix(int r, int c): r(r), c(c), data(r, vector<ll>(c, 1e9)){};
    Matrix(vector<vector<ll>> a): r(a.size()), c(a.empty() ? 0 : a[0].size()), data(a){};
    Matrix operator*(const Matrix &rhs) const{
        assert(c == rhs.r);
        Matrix res(r, rhs.c);
//        cout << (*this) << "TIMES\n" << rhs;el;
        for(int i=0;i<r;i++){
            for(int j=0;j<rhs.c;j++){
                for(int k=0;k<c;k++){
                    res.data[i][j] = min(res.data[i][j], data[i][k] + rhs.data[k][j]);
                }
            }
        }
        return res;
    }
    Matrix operator^(const long long &e) const{
        assert(r == c);
        Matrix res(r,c), base(*this);
        for(int i=0;i<r;i++) res.data[i][i] = 1;
        long long _e = e;
        while(_e){
            if(_e & 1) res = res * base;
            base = base * base;
            _e >>= 1;
        }
        return res;
    }
    int get(int _r, int _c){
        // 1-indexed
        return data[_r-1][_c-1];
    }
    friend ostream& operator<<(ostream& ouf, const Matrix &rhs){
        for(int i=0;i<rhs.r;i++){
            for(int j=0;j<rhs.c;j++){
                ouf << rhs.data[i][j] << ' ';
            }
            ouf << '\n';
        }
        return ouf;
    }
};

Matrix st[4*maxn];

int k, n, m, o, id[maxn];

void build(int idx, int l, int r, bool flag = true){
    if(l == r){
        if(flag){
            id[l] = idx;
            st[idx] = Matrix(k, k);
            // f1(i,k) f1(j,k) st[idx].data[i-1][j-1] = 1e9;
        }
        return;
    }
    int mid = (l + r) / 2;
    build(idx*2, l, mid, flag);
    build(idx*2+1, mid+1, r, flag);
    st[idx] = st[idx*2] * st[idx*2+1];
}

Matrix get(int idx, int l, int r, int u, int v){
    if(v < l || r < u) {
        Matrix res(k, k);
        f1(i, k) f1(j, k){
            if(i == j) res.data[i-1][j-1] = 0;
        }
        return res;
    }
    if(u <= l && r <= v) return st[idx];
    int mid = (l + r) / 2;
    return get(idx*2, l, mid, u, v) * get(idx*2+1, mid+1, r, u, v);
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

    if(fopen(__file_name ".inp", "r")){
        freopen(__file_name ".inp","r",stdin);
        freopen(__file_name ".out","w",stdout);
    }
    // code here
    cin >> k >> n >> m >> o;
    build(1, 0, n / k);
    f1(i,m){
        int a, b, t;
        cin >> a >> b >> t;
        int bl = a/k;
//        cout << id[bl] << ' ' << a % k << ' ' << b % k << ' ' << t;el;
        st[id[bl]].data[a % k][b % k] = min((int)st[id[bl]].data[a % k][b % k], t);
    }
    build(1, 0, n / k, false);
    // cout << "BUILD COMPLETE\n\n";
//    for(int i=0;i<=n/k;i++) cout << st[id[i]] << "\n\n";
    while(o--){
        int a, b; cin >> a >> b;
        if(a / k == b / k){
            if(a == b) cout << 0;
            else cout << -1;
            el;
            continue;
        }
        int bla = a / k, blb = b / k;
        Matrix res = Matrix(1, k);
        for(int i=0;i<k;i++) res.data[0][i] = 1e9;
        res.data[0][a % k] = 0;
//        for(int b=bla;b<blb;b++) {
//            res = res * st[id[b]];
//            cout << b << ' ' << id[b];el;
//            for(int i=0;i<k;i++) cout << res.data[0][i] << ' ';el;
//        }
//        for(int i=0;i<k;i++) cout << get(1,0,n/k,bla,blb-1).data[0][i] << ' ';el;
        res = res * get(1,0,n/k,bla,blb-1);
//        for(int i=0;i<k;i++) cout << get(1,0,n/k,bla,blb-1).data[0][i] << ' ';el;
        if(res.data[0][b % k] >= 1e9) cout << -1;
        else cout << res.data[0][b % k];
        el;
    }
    return 0;
}

Compilation message

toll.cpp: In function 'int main()':
toll.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(__file_name ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen(__file_name ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 13180 KB Output is correct
2 Correct 2 ms 6736 KB Output is correct
3 Correct 2 ms 6736 KB Output is correct
4 Correct 2 ms 6736 KB Output is correct
5 Correct 4 ms 6736 KB Output is correct
6 Correct 4 ms 6736 KB Output is correct
7 Correct 4 ms 6736 KB Output is correct
8 Correct 54 ms 13136 KB Output is correct
9 Correct 53 ms 13184 KB Output is correct
10 Correct 48 ms 13136 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 13128 KB Output is correct
2 Correct 2 ms 6736 KB Output is correct
3 Correct 2 ms 6736 KB Output is correct
4 Correct 2 ms 6736 KB Output is correct
5 Correct 2 ms 6736 KB Output is correct
6 Correct 2 ms 6736 KB Output is correct
7 Correct 13 ms 6736 KB Output is correct
8 Correct 16 ms 6736 KB Output is correct
9 Correct 54 ms 13136 KB Output is correct
10 Correct 77 ms 12808 KB Output is correct
11 Correct 59 ms 13132 KB Output is correct
12 Correct 56 ms 12368 KB Output is correct
13 Correct 52 ms 11256 KB Output is correct
14 Correct 37 ms 10064 KB Output is correct
15 Correct 41 ms 11088 KB Output is correct
16 Correct 40 ms 11092 KB Output is correct

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6908 KB Output is correct
2 Correct 2 ms 6592 KB Output is correct
3 Correct 2 ms 6736 KB Output is correct
4 Correct 2 ms 6736 KB Output is correct
5 Correct 2 ms 6736 KB Output is correct
6 Correct 3 ms 6736 KB Output is correct
7 Correct 3 ms 6736 KB Output is correct
8 Correct 3 ms 6736 KB Output is correct
9 Correct 3 ms 6916 KB Output is correct
10 Correct 29 ms 13200 KB Output is correct
11 Correct 36 ms 12880 KB Output is correct
12 Correct 40 ms 12368 KB Output is correct
13 Correct 43 ms 12548 KB Output is correct
14 Correct 37 ms 12368 KB Output is correct
15 Correct 27 ms 11256 KB Output is correct
16 Correct 27 ms 11088 KB Output is correct

Subtask #4
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6908 KB Output is correct
2 Correct 2 ms 6592 KB Output is correct
3 Correct 2 ms 6736 KB Output is correct
4 Correct 2 ms 6736 KB Output is correct
5 Correct 2 ms 6736 KB Output is correct
6 Correct 3 ms 6736 KB Output is correct
7 Correct 3 ms 6736 KB Output is correct
8 Correct 3 ms 6736 KB Output is correct
9 Correct 3 ms 6916 KB Output is correct
10 Correct 29 ms 13200 KB Output is correct
11 Correct 36 ms 12880 KB Output is correct
12 Correct 40 ms 12368 KB Output is correct
13 Correct 43 ms 12548 KB Output is correct
14 Correct 37 ms 12368 KB Output is correct
15 Correct 27 ms 11256 KB Output is correct
16 Correct 27 ms 11088 KB Output is correct
17 Correct 48 ms 13104 KB Output is correct
18 Correct 2 ms 6736 KB Output is correct
19 Correct 2 ms 6736 KB Output is correct
20 Correct 3 ms 6736 KB Output is correct
21 Correct 2 ms 6736 KB Output is correct
22 Correct 2 ms 6736 KB Output is correct
23 Correct 8 ms 6736 KB Output is correct
24 Correct 9 ms 6736 KB Output is correct
25 Correct 17 ms 6736 KB Output is correct
26 Correct 16 ms 6736 KB Output is correct
27 Correct 39 ms 13176 KB Output is correct
28 Correct 58 ms 12548 KB Output is correct
29 Correct 65 ms 12368 KB Output is correct
30 Correct 54 ms 12620 KB Output is correct

Subtask #5
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 58 ms 13180 KB Output is correct
2 Correct 2 ms 6736 KB Output is correct
3 Correct 2 ms 6736 KB Output is correct
4 Correct 2 ms 6736 KB Output is correct
5 Correct 4 ms 6736 KB Output is correct
6 Correct 4 ms 6736 KB Output is correct
7 Correct 4 ms 6736 KB Output is correct
8 Correct 54 ms 13136 KB Output is correct
9 Correct 53 ms 13184 KB Output is correct
10 Correct 48 ms 13136 KB Output is correct
11 Correct 62 ms 13128 KB Output is correct
12 Correct 2 ms 6736 KB Output is correct
13 Correct 2 ms 6736 KB Output is correct
14 Correct 2 ms 6736 KB Output is correct
15 Correct 2 ms 6736 KB Output is correct
16 Correct 2 ms 6736 KB Output is correct
17 Correct 13 ms 6736 KB Output is correct
18 Correct 16 ms 6736 KB Output is correct
19 Correct 54 ms 13136 KB Output is correct
20 Correct 77 ms 12808 KB Output is correct
21 Correct 59 ms 13132 KB Output is correct
22 Correct 56 ms 12368 KB Output is correct
23 Correct 52 ms 11256 KB Output is correct
24 Correct 37 ms 10064 KB Output is correct
25 Correct 41 ms 11088 KB Output is correct
26 Correct 40 ms 11092 KB Output is correct
27 Correct 2 ms 6908 KB Output is correct
28 Correct 2 ms 6592 KB Output is correct
29 Correct 2 ms 6736 KB Output is correct
30 Correct 2 ms 6736 KB Output is correct
31 Correct 2 ms 6736 KB Output is correct
32 Correct 3 ms 6736 KB Output is correct
33 Correct 3 ms 6736 KB Output is correct
34 Correct 3 ms 6736 KB Output is correct
35 Correct 3 ms 6916 KB Output is correct
36 Correct 29 ms 13200 KB Output is correct
37 Correct 36 ms 12880 KB Output is correct
38 Correct 40 ms 12368 KB Output is correct
39 Correct 43 ms 12548 KB Output is correct
40 Correct 37 ms 12368 KB Output is correct
41 Correct 27 ms 11256 KB Output is correct
42 Correct 27 ms 11088 KB Output is correct
43 Correct 48 ms 13104 KB Output is correct
44 Correct 2 ms 6736 KB Output is correct
45 Correct 2 ms 6736 KB Output is correct
46 Correct 3 ms 6736 KB Output is correct
47 Correct 2 ms 6736 KB Output is correct
48 Correct 2 ms 6736 KB Output is correct
49 Correct 8 ms 6736 KB Output is correct
50 Correct 9 ms 6736 KB Output is correct
51 Correct 17 ms 6736 KB Output is correct
52 Correct 16 ms 6736 KB Output is correct
53 Correct 39 ms 13176 KB Output is correct
54 Correct 58 ms 12548 KB Output is correct
55 Correct 65 ms 12368 KB Output is correct
56 Correct 54 ms 12620 KB Output is correct
57 Correct 142 ms 14408 KB Output is correct
58 Correct 68 ms 13184 KB Output is correct
59 Correct 82 ms 13128 KB Output is correct