Submission #446075

#	Time	Username	Problem	Language	Result	Execution time	Memory
446075		ak2006	Schools (IZhO13_school)	C++14	95 / 100	256 ms	25904 KiB

school

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
    fast;
}
bool cmp(vi&f,vi&s)
{
    return f[0] - s[0] > f[1] - s[1];
}
int main()
{
    setIO();
    int n,m,s;
    cin>>n>>m>>s;
    vvi a(n + 1,vi(2));
    for (int i = 1;i<=n;i++)cin>>a[i][0]>>a[i][1];
    sort(a.begin() + 1,a.end(),cmp);
    
    vl pref(n + 1),suf(n + 1);

    priority_queue<ll>q;
    ll sum = 0;
    for (int i = 1;i<=n;i++){
        q.push(-a[i][0]);
        sum += a[i][0];
        if (q.size() > m){
            ll val = -q.top();
            q.pop();
            sum -= val;
        }
        pref[i] = sum;
    }
    
    while (!q.empty())q.pop();

    sum = 0;

    for (int i = n;i>=1;i--){
        q.push(-a[i][1]);
        sum += a[i][1];
        if (q.size() > s){
            ll val = -q.top();
            q.pop();
            sum -= val;
        }
        suf[i] = sum;
    }

    ll ans = 0;

    for (int i = m;i<=n;i++)
        if (n - i >= s)ans = max(ans,pref[i] + suf[i + 1]);
    cout<<ans;
    return 0;
}

Compilation message (stderr)

school.cpp: In function 'int main()':
school.cpp:40:22: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |         if (q.size() > m){
      |             ~~~~~~~~~^~~
school.cpp:55:22: warning: comparison of integer expressions of different signedness: 'std::priority_queue<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |         if (q.size() > s){
      |             ~~~~~~~~~^~~

• Subtask 1: 95 / 100