Submission #978581

#	Time	Username	Problem	Language	Result	Execution time	Memory
978581		steveonalex	Toll (APIO13_toll)	C++17	0 / 100	127 ms	24640 KiB

toll

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

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

    int n = rngesus(1e5, 1e5), m = n - 1, k = rngesus(20, min(1LL * (n-2) * (n-1) / 2, 20)); 
    cout << n << " " << m << " " << k << "\n";

    set<pair<int, int>> S;
    for(int i = 1; i<=n; ++i) for(int j = i + 1; j<=n; ++j) {
        S.insert({i, j});
        if (S.size() > m * 3) break;
    }


    vector<int> perm(n-1);
    for(int i = 0; i<n-1; ++i) perm[i] = i + 1;
    shuffle(ALL(perm), rng);

    for(int i = 2; i<=n; ++i) {
        int u = rngesus(1, i-1), v = i, w = perm[i-2];
        S.erase({u, v});
        cout << u << " " << v << " " << w << "\n";
    }

    vector<pair<int, int>> edge(ALL(S));
    shuffle(ALL(edge), rng);
    while(k--){
        int u = edge.back().first, v = edge.back().second;
        edge.pop_back();
        cout << u << " " << v << "\n";
    }
    for(int i = 1; i<=n; ++i) cout << rngesus(1, 10) << " "; cout << "\n";

    return 0;
}

Compilation message (stderr)

toll.cpp: In function 'int main()':
toll.cpp:56:22: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   56 |         if (S.size() > m * 3) break;
      |             ~~~~~~~~~^~~~~~~
toll.cpp:77:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   77 |     for(int i = 1; i<=n; ++i) cout << rngesus(1, 10) << " "; cout << "\n";
      |     ^~~
toll.cpp:77:62: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   77 |     for(int i = 1; i<=n; ++i) cout << rngesus(1, 10) << " "; cout << "\n";
      |                                                              ^~~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 22
• Subtask 5: 0 / 22