oj.uz

Submission #573292

# Submission time Handle Problem Language Result Execution time Memory
573292 2022-06-06T11:22:25 Z MohamedAliSaidane Stranded Far From Home (BOI22_island) C++14
10 / 100
 1000 ms 16332 KB 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

        using namespace __gnu_pbds;
        using namespace std;

        typedef tree<int,null_type,less<int>,rb_tree_tag,
        tree_order_statistics_node_update> indexed_set;

        typedef long long ll;
        typedef long double ld;

        typedef pair<int,int> pii;
        typedef pair<ll,ll> pll;
        typedef pair<ld,ld> pld;

        typedef vector<int> vi;
        typedef vector<ll> vll;
        typedef vector<pii> vpi;
        typedef vector<pll> vpl;

        #define pb push_back
        #define popb pop_back
        #define pp pop_back
        #define pf push_front
        #define popf pop_front
        #define all(x) (x).begin(),(x).end()
        #define ff first
        #define ss second

        ///#define int ll

        int nx[4] = {0,0,1,-1}, ny[4] = {1,-1,0,0};
        ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;}
        ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);}

        const int nax = 2e5 + 4;
        int n, m;
        ll s[nax];
        vi adj[nax];
        ll pref[nax];
        void sub1()
        {
            string ans = "";
            for(int i = 1; i<= n; i++)
                ans += '1';
            ll sum = 0ll;
            for(int i  = 1 ; i <= n ;i ++ )
                sum += s[i];
            for(int i = 1; i <= n; i++)
            {
                ll cur = s[i];
                set<pll> pq;
                for(auto e: adj[i])
                    pq.insert({s[e],e});
                bool vis[n + 1];
                memset(vis,false,sizeof(vis));
                vis[i] = 1;
                while(!pq.empty())
                {
                    pll u = *(pq.begin());
                    pq.erase(pq.begin());
                    if(u.ff > cur)
                    {
                        ans[i - 1] = '0';
                        vis[u.ss] = 0;
                        break;
                    }
                    cur += u.ff;
                    vis[u.ss] = 1;
                    for(auto e: adj[u.ss])
                    {
                        if(vis[e])
                            continue;
                        vis[e]  = 1;
                        pq.insert({s[e],e});
                    }
                }
                if(cur < sum)
                    ans[ i - 1] - '0';
            }
            cout << ans;
        }
        void solve()
        {
            cin >> n >> m;
            for(int i = 1; i <= n; i++)
                cin >> s[i];
            for(int i = 1; i <= m; i ++)
            {
                int a, b;
                cin >> a >> b;
                adj[a].pb(b);
                adj[b].pb(a);
            }
            if(n <= 2000 && m <= 2000)
            {
                sub1();
                return ;
            }

            for(int i = 1;i  <= n ;i++)
                pref[i] = pref[i - 1] + s[i];
            int mint[n + 1];
            int maxt[n + 1];
            string ans = "";
            for(int i = 1; i <= n; i++)
            {
                mint[i] = maxt[i] = i;
                ans += '1';
            }

            for(int node = 1; node <= n; node++)
            {
                ll cur = s[node];
                int i = node - 1, j= node + 1;
                //cout << node << endl;
                while(i > 0 || j <= n)
                {
                    cur = pref[j] - pref[i];
                    j = max(j,maxt[i + 1] + 1);
                    //cout << node << ' ' << i << ' ' << j << endl;
                    if(i >= 1)
                    {
                        //cout << i << endl;
                        if(s[i] <= cur)
                        {
                            maxt[i] = max(maxt[i],j - 1);
                            mint[j - 1] = min(mint[j - 1],i);

                            i --;
                            continue;
                        }
                    }
                    if(j <= n)
                    {
                        //cout << j << endl;
                        if(s[j] <= cur)
                        {
                            maxt[i + 1] = max(maxt[i +1],j);
                            mint[j] = min(mint[j],i + 1);
                            j ++;
                            continue;
                        }
                    }
                    break;
                }
                //cout << node << ' ' << i << ' ' << j << endl;
                ans[node - 1] = (char)((int)('0') + (i == 0 && j == n + 1));
            }
            cout << ans;
        }

        int32_t main()
        {
            ios::sync_with_stdio(false);
            cin.tie(0); cout.tie(0);
            int tt = 1;
            while(tt --)
                solve();
        }

Compilation message

island.cpp: In function 'void sub1()':
island.cpp:80:33: warning: value computed is not used [-Wunused-value]
   80 |                     ans[ i - 1] - '0';

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 192 ms 5100 KB Output is correct
5 Correct 194 ms 5100 KB Output is correct
6 Correct 273 ms 5196 KB Output is correct
7 Correct 185 ms 5100 KB Output is correct
8 Correct 136 ms 5096 KB Output is correct
9 Correct 302 ms 5160 KB Output is correct
10 Correct 93 ms 5076 KB Output is correct
11 Correct 90 ms 5092 KB Output is correct
12 Correct 110 ms 5076 KB Output is correct
13 Correct 177 ms 5076 KB Output is correct
14 Correct 116 ms 5096 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4928 KB Output is correct
3 Execution timed out 1093 ms 16252 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Execution timed out 1089 ms 16220 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Execution timed out 1073 ms 16332 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 192 ms 5100 KB Output is correct
5 Correct 194 ms 5100 KB Output is correct
6 Correct 273 ms 5196 KB Output is correct
7 Correct 185 ms 5100 KB Output is correct
8 Correct 136 ms 5096 KB Output is correct
9 Correct 302 ms 5160 KB Output is correct
10 Correct 93 ms 5076 KB Output is correct
11 Correct 90 ms 5092 KB Output is correct
12 Correct 110 ms 5076 KB Output is correct
13 Correct 177 ms 5076 KB Output is correct
14 Correct 116 ms 5096 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 4928 KB Output is correct
17 Execution timed out 1093 ms 16252 KB Time limit exceeded
18 Halted 0 ms 0 KB -