Submission #245652

#	Time	Username	Problem	Language	Result	Execution time	Memory
245652		Mercenary	Schools (IZhO13_school)	C++14	100 / 100	144 ms	11888 KiB

school

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
typedef tree <int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const int maxn = 3e5 + 5;
const int mod = 1e9 + 7;
const int logn = log2(maxn) + 1;
int n , m , s;
ii a[maxn];
ll pre[maxn] ,suf[maxn];

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n >> m >> s;
    for(int i = 1 ; i <= n ; ++i)cin >> a[i].first >> a[i].second;
    sort(a + 1 , a + n + 1 , [&](const ii x , const ii y){
        return x.first - x.second > y.first - y.second;
         });
    priority_queue<ll,vector<ll>,greater<ll>> pq;
    for(int i = 1 ; i <= n ; ++i){
        pq.push(a[i].first);
        pre[i] = pre[i - 1] + a[i].first;
        while(pq.size() > m){
            pre[i] -= pq.top();
            pq.pop();
        }
    }
    while(pq.size())pq.pop();
    for(int i = n ; i >= 1 ; --i){
        pq.push(a[i].second);
        suf[i] = suf[i + 1] + a[i].second;
        while(pq.size() > s){
            suf[i] -= pq.top();
            pq.pop();
        }
    }
    ll res = 0;
    for(int i = 0 ; i <= n ; ++i)res = max(res , pre[i] + suf[i + 1]);
    cout << res;
}

Compilation message (stderr)

school.cpp: In function 'int main()':
school.cpp:41:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(pq.size() > m){
               ~~~~~~~~~~^~~
school.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(pq.size() > s){
               ~~~~~~~~~~^~~
school.cpp:29:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
school.cpp:30:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100