Submission #348469

#	Time	Username	Problem	Language	Result	Execution time	Memory
348469		beksultan04	Highway Tolls (IOI18_highway)	C++14	0 / 100	23 ms	7916 KiB

highway

#include "highway.h"
#ifndef EVAL
#include "grader.cpp"
#endif // EVAL
#include <bits/stdc++.h>
using namespace std;
#define lol long long
#define pii pair<int,int>
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define fr first
#define sc second
#define ret return
#define scanl(a) scanf("%lld",&a);
#define scanll(a,b) scanf("%lld %lld",&a, &b);
#define scanlll(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define scan1(a) scanf("%d",&a);
#define scan2(a,b) scanf("%d %d",&a, &b);
#define scan3(a,b,c) scanf("%d %d %d",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin()Ñ,s.rend()
#define pb push_back
#define sz(v) (int)v.size()
#define endi puts("");
#define eps 1e-12
const int NN = 3e5+12,INF=1e9+7;
bool vis[NN],may[100001];
vector <int> g[NN];
void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
    int n = U.size();
    vector<int> w(n);
    int i,j;
    for (i = 0; i < n; ++i){
        g[U[i]].pb(V[i]);
        g[V[i]].pb(U[i]);
        w[i] = 0;
    }

    long long ans = ask(w),l=-1,r=0;

    for (i=0;i<n;++i){
        w[i] = 1;
        int x = ask(w);
        if (x > ans){
            ans = x;
            r=U[i];
            may[U[i]]=1;
            may[V[i]]=1;
            if (l == -1)l = U[i];
        }
        else {
            w[i] = 0;
        }
    }
    bool f=1;
    vis[l]=1;
    vis[r]=1;
    while (f){
        f=0;
        for (int to : g[l]){
            if (vis[to] == 0 && may[to] == 1){
                l = to;
                vis[l]= 1;
                f=1;
                break;
            }
        }
        for (int to : g[r]){
            if (vis[to] == 0 && may[to] == 1){
                r = to;
                vis[r]= 1;
                f=1;
                break;
            }
        }

    }
    answer(l, r);
}

Compilation message (stderr)

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:33:11: warning: unused variable 'j' [-Wunused-variable]
   33 |     int i,j;
      |           ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31