Submission #829925

#	Time	Username	Problem	Language	Result	Execution time	Memory
829925		tolbi	Duathlon (APIO18_duathlon)	C++17	5 / 100	92 ms	11888 KiB

count_triplets

#pragma optimize("Bismillahirrahmanirrahim")
//█▀█─█──█──█▀█─█─█
//█▄█─█──█──█▄█─█■█
//█─█─█▄─█▄─█─█─█─█
//Allahuekber
//ahmet23 orz...
//FatihSultanMehmedHan
//YavuzSultanSelimHan
//AbdulhamidHan
//Sani buyuk Osman Pasa Plevneden cikmam diyor
#define author tolbi
#include <bits/stdc++.h>
using namespace std;
#define deci(x) int x;cin>>x;
#define decstr(x) string x;cin>>x;
#define sortarr(x) sort(x.begin(), x.end())
#define sortrarr(x) sort(x.rbegin(), x.rend())
#define rev(x) reverse(x.begin(), x.end())
#define cinarr(x) for (auto &it : x) cin>>it;
#define coutarr(x) for (auto &it : x) cout<<it<<" ";cout<<endl;
#define tol(bi) (1LL<<((int)(bi)))
#define endl '\n'
typedef long long ll;
mt19937 ayahya(chrono::high_resolution_clock().now().time_since_epoch().count());
int32_t main(){
    int T = 1;
    int tno = 0;
    while (T-(tno++)){
        ll ans = 0;
        deci(n);deci(m);
        vector<vector<int>> arr(n);
        for (int i = 0; i < m; ++i)
        {
            deci(u);deci(v);
            arr[u-1].push_back(v-1);
            arr[v-1].push_back(u-1);
        }
        auto dene = [&](int a, int b, int c)->bool{
            if (a==b || b==c || a==c) return false;
            vector<vector<int>> dp(n,vector<int>(tol(n),-1));
            auto f = [&](int node, int mask, auto f)->int{
                if (dp[node][mask]!=-1) return dp[node][mask];
                if (node==c){
                    if (mask&tol(b)) return true;
                    return false;
                }
                dp[node][mask]=0;
                for (int i = 0; i < arr[node].size(); i++){
                    if (tol(arr[node][i])&mask) continue;
                    mask+=tol(arr[node][i]);
                    if (f(arr[node][i],mask,f)){
                        return dp[node][mask]=1;
                    }
                    mask-=tol(arr[node][i]);
                }
                return dp[node][mask];
            };
            //if (f(a,tol(a),f)) cout<<a<<" "<<b<<" "<<c<<endl;
            return f(a,tol(a),f);
        };
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++){
                for (int k = 0; k < n; k++){
                    if (dene(i,j,k)) ans++;
                }
            }
        }
        cout<<ans<<endl;
    }
}

Compilation message (stderr)

count_triplets.cpp:1: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    1 | #pragma optimize("Bismillahirrahmanirrahim")
      | 
count_triplets.cpp: In instantiation of 'main()::<lambda(int, int, int)>::<lambda(int, int, auto:23)> [with auto:23 = main()::<lambda(int, int, int)>::<lambda(int, int, auto:23)>]':
count_triplets.cpp:59:21:   required from here
count_triplets.cpp:48:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |                 for (int i = 0; i < arr[node].size(); i++){
      |                                 ~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 8
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 15
• Subtask 7: 0 / 20
• Subtask 8: 0 / 8
• Subtask 9: 0 / 10