oj.uz

Submission #1054342

# Submission time Handle Problem Language Result Execution time Memory
1054342 2024-08-12T08:55:52 Z idas Palembang Bridges (APIO15_bridge) C++17
63 / 100
 2000 ms 11428 KB 
#pragma GCC optimize("O3")

#include <bits/stdc++.h>
#define FAST_IO ios_base::sync_with_stdio(false); cin.tie(nullptr)
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define pb push_back
#define s second
#define f first

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;

const int N=1e5+10;
int k, n;
ll ans;
vector<int> a;
vector<pii> inf;

bool cmp(pii a, pii b) {
    return (a.f+a.s)<(b.f+b.s);
}

ll s[4];
void fix(int in, multiset<int> &a, multiset<int> &b) {
    int tot=a.size()+b.size();
    while(a.size()>(tot+1)/2) {
        int val=*a.rbegin();
        a.erase(a.find(val));
        s[in]-=val;
        b.insert(val);
        s[in+1]+=val;
    }
    while(b.size()>tot/2) {
        int val=*b.begin();
        b.erase(b.find(val));
        s[in+1]-=val;
        a.insert(val);
        s[in]+=val;
    }
}

ll calc() {
    return s[1]-s[0]+s[3]-s[2];
}

int main() {
    FAST_IO;
    cin >> k >> n;
    FOR(i, 0, n) {
        char c1, c2; int x1, x2;
        cin >> c1 >> x1 >> c2 >> x2;
        if(c1==c2) {
            ans+=abs(x1-x2);
        }
        else {
            inf.pb({x1,x2});
            a.pb(x1);
            a.pb(x2);
        }
    }
    sort(a.begin(), a.end());
    n=a.size();
    ans+=n/2;
    if(n==0) {
        cout << ans;
        return 0;
    }
    multiset<int> l, r, le, ri;
    sort(inf.begin(), inf.end(), cmp);
    FOR(i, 0, inf.size()) {
        le.insert(inf[i].f);
        le.insert(inf[i].s);
        s[2]+=inf[i].f+inf[i].s;
    }
    while(le.size()>(le.size()+ri.size()+1)/2) {
        int val=*le.rbegin();
        le.erase(le.find(val));
        ri.insert(val);
        s[2]-=val; s[3]+=val;
    }

    ll ret=calc()+ans;

    if(k==1) {
        cout << ret;
        return 0;
    }

    FOR(i, 0, inf.size()) {
        int val=inf[i].f;
        if(l.empty()) l.insert(val), s[0]+=val;
        else {
            int md=*l.rbegin();
            if(val>=md) r.insert(val), s[1]+=val;
            else l.insert(val), s[0]+=val;
        }

        if(le.count(val)) le.erase(le.find(val)), s[2]-=val;
        else ri.erase(ri.find(val)), s[3]-=val;

        val=inf[i].s;
        if(l.empty()) l.insert(val), s[0]+=val;
        else {
            int md=*l.rbegin();
            if(val>=md) r.insert(val), s[1]+=val;
            else l.insert(val), s[0]+=val;
        }

        if(le.count(val)) le.erase(le.find(val)), s[2]-=val;
        else ri.erase(ri.find(val)), s[3]-=val;

        fix(0, l, r);
        fix(2, le, ri);

        ret=min(ret, ans+calc());
    }
    cout << ret;
}

Compilation message

bridge.cpp: In function 'void fix(int, std::multiset<int>&, std::multiset<int>&)':
bridge.cpp:28:19: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |     while(a.size()>(tot+1)/2) {
      |           ~~~~~~~~^~~~~~~~~~
bridge.cpp:35:19: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |     while(b.size()>tot/2) {
      |           ~~~~~~~~^~~~~~
bridge.cpp: In function 'int main()':
bridge.cpp:5:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
      |                                                ^
bridge.cpp:72:5: note: in expansion of macro 'FOR'
   72 |     FOR(i, 0, inf.size()) {
      |     ^~~
bridge.cpp:5:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
      |                                                ^
bridge.cpp:91:5: note: in expansion of macro 'FOR'
   91 |     FOR(i, 0, inf.size()) {
      |     ^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 476 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 49 ms 11428 KB Output is correct
13 Correct 93 ms 11212 KB Output is correct
14 Correct 76 ms 10104 KB Output is correct
15 Correct 46 ms 6860 KB Output is correct
16 Correct 57 ms 11244 KB Output is correct
17 Correct 58 ms 11232 KB Output is correct
18 Correct 56 ms 11196 KB Output is correct
19 Correct 57 ms 11180 KB Output is correct
20 Correct 52 ms 11316 KB Output is correct
21 Correct 59 ms 11192 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 3 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 3 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 3 ms 568 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 2 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 576 KB Output is correct
25 Execution timed out 2094 ms 11196 KB Time limit exceeded
26 Halted 0 ms 0 KB -