Submission #703582

#TimeUsernameProblemLanguageResultExecution timeMemory
703582raysh07Schools (IZhO13_school)C++17
100 / 100
181 ms19504 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define INF (int)1e18 #define f first #define s second mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count()); int n, x, y; const int maxn = 3e5 + 69; pair<int, int> ab[maxn]; int s[maxn]; int s2[maxn]; bool comp(pair<int, int> c, pair<int, int> d){ return (c.f - c.s > d.f - d.s); //so high a will be first } void Solve() { cin>>n>>x>>y; for (int i=1; i<=n; i++) cin>>ab[i].f>>ab[i].s; sort(ab+1, ab+n+1, comp); multiset <int> a; s[0] = 0; for (int i=1; i<=n; i++){ a.insert(ab[i].f); s[i] = s[i-1] + ab[i].f; if (a.size() > x){ s[i] -= *a.begin(); a.erase(a.find(*a.begin())); } } multiset <int> b; for (int i=n; i>=1; i--){ b.insert(ab[i].s); s2[i-1] = s2[i] + ab[i].s; if (b.size() > y){ s2[i-1] -= *b.begin(); b.erase(b.find(*b.begin())); } } int ans = 0; for (int i=x; i<=n-y; i++){ ans = max(ans, s[i] + s2[i]); } cout<<ans<<"\n"; } int32_t main() { auto begin = std::chrono::high_resolution_clock::now(); ios_base::sync_with_stdio(0); cin.tie(0); int t = 1; // cin >> t; for(int i = 1; i <= t; i++) { //cout << "Case #" << i << ": "; Solve(); } auto end = std::chrono::high_resolution_clock::now(); auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin); cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; return 0; }

Compilation message (stderr)

school.cpp: In function 'void Solve()':
school.cpp:34:22: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   34 |         if (a.size() > x){
      |             ~~~~~~~~~^~~
school.cpp:45:22: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   45 |         if (b.size() > y){
      |             ~~~~~~~~~^~~
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