oj.uz

답안 #1115910

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1115910 2024-11-21T04:07:30 Z vjudge1 Toll (BOI17_toll) C++17
100 / 100
 115 ms 14160 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 65 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 69 ms 13136 KB Output is correct
9 Correct 60 ms 13148 KB Output is correct
10 Correct 50 ms 13196 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 68 ms 13076 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 14 ms 6736 KB Output is correct
8 Correct 21 ms 6872 KB Output is correct
9 Correct 48 ms 13184 KB Output is correct
10 Correct 70 ms 12616 KB Output is correct
11 Correct 61 ms 13096 KB Output is correct
12 Correct 61 ms 12368 KB Output is correct
13 Correct 54 ms 11088 KB Output is correct
14 Correct 34 ms 10064 KB Output is correct
15 Correct 43 ms 11088 KB Output is correct
16 Correct 40 ms 11088 KB Output is correct

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6736 KB Output is correct
2 Correct 2 ms 6572 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 3 ms 6736 KB Output is correct
8 Correct 3 ms 6908 KB Output is correct
9 Correct 3 ms 6736 KB Output is correct
10 Correct 26 ms 13136 KB Output is correct
11 Correct 36 ms 13032 KB Output is correct
12 Correct 37 ms 12548 KB Output is correct
13 Correct 40 ms 12544 KB Output is correct
14 Correct 33 ms 12368 KB Output is correct
15 Correct 24 ms 10920 KB Output is correct
16 Correct 23 ms 11088 KB Output is correct

Subtask #4
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6736 KB Output is correct
2 Correct 2 ms 6572 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 3 ms 6736 KB Output is correct
8 Correct 3 ms 6908 KB Output is correct
9 Correct 3 ms 6736 KB Output is correct
10 Correct 26 ms 13136 KB Output is correct
11 Correct 36 ms 13032 KB Output is correct
12 Correct 37 ms 12548 KB Output is correct
13 Correct 40 ms 12544 KB Output is correct
14 Correct 33 ms 12368 KB Output is correct
15 Correct 24 ms 10920 KB Output is correct
16 Correct 23 ms 11088 KB Output is correct
17 Correct 42 ms 13128 KB Output is correct
18 Correct 2 ms 6736 KB Output is correct
19 Correct 2 ms 6736 KB Output is correct
20 Correct 2 ms 6736 KB Output is correct
21 Correct 2 ms 6908 KB Output is correct
22 Correct 2 ms 6736 KB Output is correct
23 Correct 7 ms 6736 KB Output is correct
24 Correct 10 ms 6736 KB Output is correct
25 Correct 16 ms 6736 KB Output is correct
26 Correct 13 ms 6736 KB Output is correct
27 Correct 39 ms 13136 KB Output is correct
28 Correct 51 ms 12368 KB Output is correct
29 Correct 53 ms 12368 KB Output is correct
30 Correct 49 ms 12456 KB Output is correct

Subtask #5
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 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 69 ms 13136 KB Output is correct
9 Correct 60 ms 13148 KB Output is correct
10 Correct 50 ms 13196 KB Output is correct
11 Correct 68 ms 13076 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 14 ms 6736 KB Output is correct
18 Correct 21 ms 6872 KB Output is correct
19 Correct 48 ms 13184 KB Output is correct
20 Correct 70 ms 12616 KB Output is correct
21 Correct 61 ms 13096 KB Output is correct
22 Correct 61 ms 12368 KB Output is correct
23 Correct 54 ms 11088 KB Output is correct
24 Correct 34 ms 10064 KB Output is correct
25 Correct 43 ms 11088 KB Output is correct
26 Correct 40 ms 11088 KB Output is correct
27 Correct 2 ms 6736 KB Output is correct
28 Correct 2 ms 6572 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 2 ms 6736 KB Output is correct
33 Correct 3 ms 6736 KB Output is correct
34 Correct 3 ms 6908 KB Output is correct
35 Correct 3 ms 6736 KB Output is correct
36 Correct 26 ms 13136 KB Output is correct
37 Correct 36 ms 13032 KB Output is correct
38 Correct 37 ms 12548 KB Output is correct
39 Correct 40 ms 12544 KB Output is correct
40 Correct 33 ms 12368 KB Output is correct
41 Correct 24 ms 10920 KB Output is correct
42 Correct 23 ms 11088 KB Output is correct
43 Correct 42 ms 13128 KB Output is correct
44 Correct 2 ms 6736 KB Output is correct
45 Correct 2 ms 6736 KB Output is correct
46 Correct 2 ms 6736 KB Output is correct
47 Correct 2 ms 6908 KB Output is correct
48 Correct 2 ms 6736 KB Output is correct
49 Correct 7 ms 6736 KB Output is correct
50 Correct 10 ms 6736 KB Output is correct
51 Correct 16 ms 6736 KB Output is correct
52 Correct 13 ms 6736 KB Output is correct
53 Correct 39 ms 13136 KB Output is correct
54 Correct 51 ms 12368 KB Output is correct
55 Correct 53 ms 12368 KB Output is correct
56 Correct 49 ms 12456 KB Output is correct
57 Correct 115 ms 14160 KB Output is correct
58 Correct 59 ms 13136 KB Output is correct
59 Correct 78 ms 13132 KB Output is correct