Submission #122595

#	Time	Username	Problem	Language	Result	Execution time	Memory
122595		tselmegkh	The Big Prize (IOI17_prize)	C++14	100 / 100	64 ms	10328 KiB

prize

#include<bits/stdc++.h>
#include "prize.h"
using namespace std;

#define INF 1e9
#define MAX 200005
#define xx first
#define yy second
#define pb push_back
#define mp make_pair
#define ull long long
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define nl '\n'
#define zai <<' '<<
#define all(a) a.begin(),a.end()
#define pc __builtin_popcount
#define debug(args...)  cerr << #args << " = "; Dbg,args; cerr << nl;
struct Dbg { template<typename T> Dbg& operator,(const T& v) { cerr << v << ", "; return *this; } } Dbg;
template <typename T> ostream& operator<<(ostream& _o_, const vector<T>& _v_){
if(!_v_.empty()){_o_<<'[';copy(_v_.begin(),_v_.end(),ostream_iterator<T>(_o_,", "));_o_<<"\b\b]";}return _o_;}
typedef vector<int> vi;
typedef pair<int,int> ii;
typedef vector<ii> vii;
template<class C> void mini(C &_a, C _b) { _a = min(_a, _b); }
template<class C> void maxi(C &_a, C _b) { _a = max(_a, _b); }

map<int, vi> mymap[MAX];

int res = -1;
void go(int l, int r){
    if(l > r)return;
    if(res != -1)return;
    int mid = (l + r) >> 1;
    vi query = ask(mid);
    if(query[0] + query[1] == 0){
        res = mid;
        return;
    }

    bool ansonl = 1, ansonr = 1;
        auto uit = mymap[query[0] + query[1]].upper_bound(mid);
        if(uit != mymap[query[0] + query[1]].end()){
            if((*uit).second[0] == query[0])ansonr = 0;
        }
        if(uit != mymap[query[0] + query[1]].begin()){
            uit--;
        }
        if(uit != mymap[query[0] + query[1]].begin()){
            if((*uit).second[1] == query[1])ansonl = 0;
        }
    mymap[query[0] + query[1]][mid] = query;
    if(ansonr){
        go(mid + 1, r);
    }
    if(ansonl){
        go(l, mid - 1);
    }
}
int find_best(int n){
    go(0, n - 1);
    return res;
}

• Subtask 1: 20 / 20
• Subtask 2: 80 / 80