Submission #119563

# Submission time Handle Problem Language Result Execution time Memory
119563 2019-06-21T11:45:52 Z Charis02 Palembang Bridges (APIO15_bridge) C++14
22 / 100
215 ms 16004 KB
#include<iostream>
#include<stdio.h>
#include<vector>
#include<cmath>
#include<queue>
#include<utility>
#include<string.h>
#include<map>
#include<set>
#include<algorithm>
#define ll long long
#define pi pair < ll,ll >
#define mp(a,b) make_pair(a,b)
#define rep(i,a,b) for(int i = a;i < b;i++)
#define N 100004
#define INF 1e18

using namespace std;

ll n,k;
pi ar[N];
ll b,d;
char a,c;
ll ans,cnt;
vector <ll>possible;
vector < ll > ola;
set < ll > p;

ll abso(ll x)
{
    if(x<0)
        return -x;
    return x;
}

ll checkbridge(ll x,ll y)
{
    ll res = ans;

    rep(i,0,cnt)
    {
        if(ar[i].first <= x && x <= ar[i].second)
        {
            res += ar[i].second-ar[i].first;
        }
        else if(ar[i].first <= y && y <= ar[i].second)
        {
            res+=ar[i].second-ar[i].first;
        }
        else
        {
            res += 2*min(min(abso(ar[i].first-x),abso(ar[i].second-x)),min(abso(ar[i].first-y),abso(ar[i].second-y)))+(ar[i].second-ar[i].first);
        }
    }

 //   cout << x << " " << y << " " << res << endl;

    return res;
}

ll findans(ll x)
{
    ll low = 0;
    ll high = x;
    ll res = 0;

    while(low <= high)
    {
        ll mid = (low+high)/2;

        if(checkbridge(possible[x],possible[mid-1]) >= checkbridge(possible[x],possible[mid]))
        {
            low = mid+1;
            res = mid;
        }
        else
        {
            high = mid-1;
        }
    }
    return checkbridge(possible[x],possible[res]);
}

void solve2()
{
    ll fin = checkbridge(possible[0],possible[0]);

    ll low = 0;
    ll high = possible.size()-1;
    ll res = 0;

    while(low <= high)
    {
        ll mid = (low+high)/2;

        if(findans(mid-1) >= findans(mid))
        {
            low = mid+1;
            res = mid;
        }
        else
            high = mid-1;
    }

    fin = findans(res);
    low = 0;
    high = possible.size()-1;
    res = possible.size()-1;

    while(low <= high)
    {
        ll mid= (low+high)/2;

        if(mid==possible.size()-1||findans(mid+1) >= findans(mid))
        {
            high = mid-1;
            res=mid;
        }
        else
        {
            low=mid+1;
        }
    }

    cout << min(fin,findans(res)) << endl;
    return;
}

int main()
{
    ios_base::sync_with_stdio(false);

   // freopen("bridge_3_3.in","r",stdin);
    cin >> k >> n;

    rep(i,0,n)
    {
        cin >> a >> b >> c >> d;

        if(d < b)
            swap(b,d);

        if(a == c)
            ans += d-b;
        else
        {
            ar[cnt].first = b;
            ar[cnt].second = d;
            ola.push_back(b);
            ola.push_back(d);
            ans++;
            cnt++;
        }
    }

    if(cnt == 0)
    {
        cout << ans;
        return 0;
    }

    rep(i,0,cnt)
    {
        p.insert(ar[i].first);
        p.insert(ar[i].second);
    }

    for(set < ll >::iterator it = p.begin();it != p.end();it++)
    {
        possible.push_back(*it);
    }

    if(k == 2)
    {
        solve2();
        return 0;
    }

    ll low = 0;
    ll high = possible.size()-1;
    ll res = 0;

    while(low <= high)
    {
        ll mid = (low+high)/2;

        if(checkbridge(possible[mid-1],possible[mid-1]) >= checkbridge(possible[mid],possible[mid]))
        {
            low = mid+1;
            res = mid;
        }
        else
        {
            high = mid-1;
        }
    }

    cout << checkbridge(possible[res],possible[res]);

    return 0;
}

/*
2 5
B 0 A 4
B 1 B 3
A 5 B 7
B 2 A 6
B 1 A 7

2 3
A 1 B 1
A 4 B 7
A 10 B 12
*/

Compilation message

bridge.cpp: In function 'void solve2()':
bridge.cpp:114:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(mid==possible.size()-1||findans(mid+1) >= findans(mid))
            ~~~^~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 512 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 512 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 512 KB Output is correct
12 Correct 25 ms 3576 KB Output is correct
13 Correct 215 ms 15976 KB Output is correct
14 Correct 68 ms 3816 KB Output is correct
15 Correct 120 ms 9360 KB Output is correct
16 Correct 30 ms 3708 KB Output is correct
17 Correct 105 ms 16004 KB Output is correct
18 Correct 102 ms 15972 KB Output is correct
19 Correct 202 ms 15592 KB Output is correct
20 Correct 37 ms 3568 KB Output is correct
21 Correct 134 ms 15972 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Incorrect 5 ms 384 KB Output isn't correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Incorrect 2 ms 384 KB Output isn't correct
13 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Incorrect 2 ms 384 KB Output isn't correct
13 Halted 0 ms 0 KB -