Submission #396977

#	Time	Username	Problem	Language	Result	Execution time	Memory
396977		leinad2	Palembang Bridges (APIO15_bridge)	C++17	41 / 100	2079 ms	6636 KiB

bridge

#include<bits/stdc++.h>
#define int long long
using namespace std;
char c, d;
int a, b, n, i, j, k;
long long ans, res, ans2=1e18;
struct st
{
    int a, b;
};
vector<st>v;
bool cmp(st a, st b)
{
    return a.a+a.b<b.a+b.b;
}
main()
{
    ios_base::sync_with_stdio(!cin.tie(NULL));
    for(cin>>k>>n;i++<n;)
    {
        cin>>c>>a>>d>>b;
        if(c==d)ans+=abs(b-a);
        else ans++,v.push_back({a, b});
    }
    sort(v.begin(), v.end(), cmp);
    for(i=0;i<=v.size();i++)
    {
        vector<int>V;res=0;
        for(j=0;j<i;j++)
        {
            V.push_back(v[j].a);V.push_back(v[j].b);
        }
        sort(V.begin(), V.end());
        for(k=0;k<V.size()/2;k++)res-=V[k];
        for(k=V.size()/2;k<V.size();k++)res+=V[k];
        V.clear();
        for(j=i;j<v.size();j++)
        {
            V.push_back(v[j].a);V.push_back(v[j].b);
        }
        sort(V.begin(), V.end());
        for(k=0;k<V.size()/2;k++)res-=V[k];
        for(k=V.size()/2;k<V.size();k++)res+=V[k];
        ans2=min(ans2, res);
    }
    cout<<ans+ans2;
}

Compilation message (stderr)

bridge.cpp:16:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   16 | main()
      |      ^
bridge.cpp: In function 'int main()':
bridge.cpp:26:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<st>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(i=0;i<=v.size();i++)
      |             ~^~~~~~~~~~
bridge.cpp:34:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(k=0;k<V.size()/2;k++)res-=V[k];
      |                 ~^~~~~~~~~~~
bridge.cpp:35:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(k=V.size()/2;k<V.size();k++)res+=V[k];
      |                          ~^~~~~~~~~
bridge.cpp:37:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<st>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for(j=i;j<v.size();j++)
      |                 ~^~~~~~~~~
bridge.cpp:42:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(k=0;k<V.size()/2;k++)res-=V[k];
      |                 ~^~~~~~~~~~~
bridge.cpp:43:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for(k=V.size()/2;k<V.size();k++)res+=V[k];
      |                          ~^~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 9 / 9
• Subtask 4: 32 / 32
• Subtask 5: 0 / 37