제출 #945069

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
945069		Wansur	커다란 상품 (IOI17_prize)	C++14	93.95 / 100	34 ms	6712 KiB

prize

#include <bits/stdc++.h>
#define f first
#define s second
#define ent '\n'

typedef long long ll;
using namespace std;

struct asd{
    int a, b, w, ca, cb;
};

vector<int> ask(int i);
const string out[2]={"NO\n","YES\n"};
const ll dx[]={0,1,0,-1,-1,1,1,-1};
const ll dy[]={1,0,-1,0,-1,1,-1,1};
const int mod=998244353;
const int md=1e9+7;
const int mx=2e5+12;
const bool T=0;

vector<int> ans[mx];
int ma;

vector<int> Ask(int i){
    if(ans[i].size()){
        return ans[i];
    }
    return ans[i]=ask(i);
}

int find(int l,int r,int x,int left,int right){
    if(!x || l>r)return -1;
    int mid=l+r>>1, cnt=0;
    for(int x=0;mid-x>=l || mid+x<=r;x++){
        if(mid+x<=r){
            auto a=Ask(mid+x);
            if(a[0]+a[1]==ma){
                int val=find(mid+x+1, r, a[1]-right, a[0], right);
                if(val!=-1)return val;
                val=find(l, mid - x - (x==0), a[0] - cnt - left, left, a[1] + cnt);
                return val;
            }
            if(a[0]+a[1]==0){
                return mid+x;
            }
            cnt++;
        }
        if(mid-x>=l){
            auto a=Ask(mid-x);
            if(a[0]+a[1]==ma){
                int val=find(l, mid-x-1, a[0]-left, left, a[1]);
                if(val!=-1)return val;
                val=find(mid+x+1, r, a[1] - cnt - right, a[0] + cnt, right);
                return val;
            }
            if(a[0]+a[1]==0){
                return mid-x;
            }
            cnt++;
        }
    }
    return -1;
}

int find_best(int n){
    int pos=0, c=0;
    for(int i=0;i<600;i++){
        auto a=Ask(i);
        if(a[0]+a[1]==0){
            return i;
        }
        if(a[0]+a[1]>ma){
            ma=a[0]+a[1];
        }
    }
    for(int i=0;i<600;i++){
        auto a=Ask(i);
        if(a[0]+a[1]!=ma){
            c++;
        }
    }
    return find(600, n-1, ma - c, c, 0);
}

컴파일 시 표준 에러 (stderr) 메시지

prize.cpp: In function 'int find(int, int, int, int, int)':
prize.cpp:34:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   34 |     int mid=l+r>>1, cnt=0;
      |             ~^~
prize.cpp: In function 'int find_best(int)':
prize.cpp:67:9: warning: unused variable 'pos' [-Wunused-variable]
   67 |     int pos=0, c=0;
      |         ^~~

• Subtask 1: 20 / 20
• Subtask 2: 73.95 / 80