Submission #709674

#	Time	Username	Problem	Language	Result	Execution time	Memory
709674		ktkerem	Sure Bet (CEOI17_sure)	C++17	100 / 100	136 ms	11696 KiB

sure

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
#include<bits/stdc++.h>
typedef long long ll;
typedef long double ld;
#define llll std::pair<ll , ll>
#define pb push_back
#define fi first
#define sec second
#define all(a) a.begin() , a.end()
#define debug std::cout << "!!ALERT ALERT!!" << std::endl;
const ll limit = 1e18+7;
const ll sus = 1e6;
std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
ll rnd(ll a , ll b){
    return (rng() % (b-a+1)) + a;
}
/*global variables*/
ll n;
std::vector<std::pair<ld,ld>> ar;
/**/
/*functions*/
/**/
void solve(){
    std::cin >> n;
    ar.resize(n);
    std::vector<ld> fa , fb , pfa , pfb;
    for(ll i=0;n>i;i++){
        std::cin >> ar[i].fi >> ar[i].sec;
        if(ar[i].fi >= 1.0){
            fa.pb(ar[i].fi);
        }
        if(ar[i].sec >= 1.0){
            fb.pb(ar[i].sec);
        }
    }
    if(fa.size() == 0 || fb.size() == 0){
        std::cout << 0 << "\n";
        return;
    }
    ld ans = 0;
    //std::cout << fa.size() << std::endl;
    std::sort(fa.begin() , fa.end());
    std::sort(fb.begin() , fb.end());
    std::reverse(all(fa));
    std::reverse(all(fb));
    pfa.resize(fa.size());
    pfb.resize(fb.size());
    pfa[0] = fa[0] - 1;
    pfb[0] = fb[0] - 1;
    for(ll i = 1;fa.size() > i;i++){
        pfa[i] += fa[i] + pfa[i-1] -1;
    }
    for(ll i = 1;fb.size() > i;i++){
        pfb[i] += fb[i] + pfb[i-1] -1;
    }
    ld ba = 0;
    for(ll i = 0;fa.size()>i;i++){
        ba += fa[i] - 1;
        ll l = 0 , r = (ll)fb.size() - 1; 
        while(r > l){
            ll md = (l + r + 1)/2;
            if(pfb[md] - (i+1) > ba - (md+1)){
                r = md-1;
            }
            else{
                l = md;
            }
        }
        if(pfb[l] - (i+1) > ba - (l+1)){
            continue;
        }
        ans = std::max(ans , pfb[l] - (i+1));
    }
    ba = 0;
    for(ll i = 0;fb.size()>i;i++){
        ba += fb[i] - 1;
        ll l = 0 , r = (ll)fa.size() - 1; 
        while(r > l){
            ll md = (l + r + 1)/2;
            if(pfa[md] - (i+1) > ba - (md+1)){
                r = md-1;
            }
            else{
                l = md;
            }
        }
        if(pfa[l] - (i+1) > ba - (l+1)){
            continue;
        }
        ans = std::max(ans , pfa[l] - (i+1));
    }
    std::cout << std::setprecision(4) << std::fixed;
    std::cout << ans;
    return;/**/
}
int main(){
    std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
    /*#ifndef ONLINE_JUDGE
        freopen("in.txt" , "r" , stdin);
        freopen("out.txt" , "w" , stdout);
    #endif*/
    ll t = 1;
    //std::cin >> t;
    while(t--){
        solve();
    }
}

Compilation message (stderr)

sure.cpp:5:78: warning: "/*" within comment [-Wcomment]
    5 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
      |                                                                               
sure.cpp: In function 'void solve()':
sure.cpp:54:28: warning: comparison of integer expressions of different signedness: 'std::vector<long double>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   54 |     for(ll i = 1;fa.size() > i;i++){
      |                  ~~~~~~~~~~^~~
sure.cpp:57:28: warning: comparison of integer expressions of different signedness: 'std::vector<long double>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   57 |     for(ll i = 1;fb.size() > i;i++){
      |                  ~~~~~~~~~~^~~
sure.cpp:61:27: warning: comparison of integer expressions of different signedness: 'std::vector<long double>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   61 |     for(ll i = 0;fa.size()>i;i++){
      |                  ~~~~~~~~~^~
sure.cpp:79:27: warning: comparison of integer expressions of different signedness: 'std::vector<long double>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   79 |     for(ll i = 0;fb.size()>i;i++){
      |                  ~~~~~~~~~^~

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40