Submission #951517

#	Time	Username	Problem	Language	Result	Execution time	Memory
951517		Nhoksocqt1	Swapping Cities (APIO20_swap)	C++17	0 / 100	1 ms	4444 KiB

swap

#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 100005;

struct Edge {
    int u, v, w;
} edge[2 * MAXN];

vector<ii> adj[MAXN];
int deg[MAXN], maxw, numNode, numEdge;
bool check_sub1, check_sub2;

void init(int _N, int _M, vector<int> _U, vector<int> _V, vector<int> _W) {
    numNode = _N, numEdge = _M;

    check_sub2 = 1;
    for (int i = 0; i < numEdge; ++i) {
        edge[i] = {_U[i], _V[i], _W[i]};
        adj[edge[i].u].push_back(ii(edge[i].v, edge[i].w));
        adj[edge[i].v].push_back(ii(edge[i].u, edge[i].w));
        check_sub2 &= (edge[i].u == 0);
        maxw = max(maxw, edge[i].w);
    }

    check_sub1 = 1;
    for (int i = 0; i < numNode; ++i)
        check_sub1 &= (sz(adj[i]) <= 2);

    sort(edge, edge + numEdge, [](const Edge &a, const Edge &b) {
        return (a.w < b.w);
    });
}

int getMinimumFuelCapacity(int x, int y) {
    if(check_sub1)
        return maxw;

    return -1;
}

#ifdef Nhoksocqt1

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

    #define TASK "swap"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    vector<int> _U, _V, _W;
    int _N, _M, _Q;
    cin >> _N >> _M >> _Q;

    _U.resize(_M), _V.resize(_M), _W.resize(_M);
    for (int i = 0; i < _M; ++i) {
        cin >> _U[i] >> _V[i] >> _W[i];
    }

    init(_N, _M, _U, _V, _W);
    for (int t = 0; t < _Q; ++t) {
        int _X, _Y;
        cin >> _X >> _Y;
        cout << "MINIMUM FUEL CAPACITY " << _X << ' ' << " TO " << _Y << ": " << getMinimumFuelCapacity(_X, _Y) << '\n';
    }

    return 0;
}

#endif // Nhoksocqt1

• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27