oj.uz

Submission #614205

# Submission time Handle Problem Language Result Execution time Memory
614205 2022-07-30T21:49:17 Z StrawHatWess The Big Prize (IOI17_prize) C++17
90 / 100
 76 ms 2024 KB 
#include "prize.h"

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

typedef long long ll; 
#define FOR(i,a,b) for(int i=a; i<b; i++)
typedef vector<int>vi; 
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x) 
typedef pair<ll,ll>pi;
typedef vector<pi>vpi; 
#define fi first
#define se second

template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

const ll INF=1e18; 

//-------------------------------------

const int B=600; 	
const int MX=2e5+10;

int N,X=0;

unordered_map<int,int>mn,mx; 
vi L(MX,-1), R(MX,-1); 


vi query(int i){
	if(L[i]==-1){
		vi vec=ask(i);
		L[i]=vec[0]; R[i]=vec[1]; 

		if(L[i]+R[i]==X){
			if(!mn.count(L[i])) mn[L[i]]=i, mx[L[i]]=i; 
			
			if(ckmin(mn[L[i]],i)){
				int j=i+1; 
				while(j<N && L[j]==-1){
					L[j]=L[i], R[j]=R[i]; 
					j++;
				}
			}

			if(ckmax(mx[L[i]],i)){
				int j=i-1; 
				while(j>=0 && L[j]==-1){
					L[j]=L[i], R[j]=R[i];  
					j--;
				}
			}
		}
	} 
	return vi{L[i],R[i]};  
}




int find_best(int N) {
	::N=N; 

	int idx;
	FOR(i,0,min(N,B)){
		vi vec=query(i);

		if(vec[0]==0 && vec[1]==0) return i; 

		if(ckmax(X,vec[0]+vec[1])) idx=i;  
	}

	

	int done=0; 

	while(idx<N){
		vi tmp=query(idx); 

		int l=idx, r=N-1, nxt=N;
		while(l<=r){
			int m=(l+r)/2;

			vi vec=query(m); 
			if(vec[0]==0 && vec[1]==0) return m;

			if(vec[0]+vec[1]<X) nxt=m, r=m-1; 
			else{
				if(vec[0]==tmp[0]) l=m+1; 
				else r=m-1; 
			}
		}


		
		while(nxt<N){
			vi vec=query(nxt);
			if(vec[0]==0 && vec[1]==0) return nxt; 
			if(vec[0]+vec[1]==X) break; 
			nxt++;  
		}			
		

		idx=nxt; 
		done++; 
	}
	//assert(0); 

}

/*
8
3 2 3 1 3 3 2 3
*/

/*

10
3 3 2 3 3 3 1 2 3 3

*/

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:112:1: warning: control reaches end of non-void function [-Wreturn-type]
  112 | }
      | ^
prize.cpp:85:12: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   85 |    int m=(l+r)/2;
      |          ~~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 1876 KB Output is correct
2 Correct 7 ms 1744 KB Output is correct
3 Correct 11 ms 1920 KB Output is correct
4 Correct 5 ms 1872 KB Output is correct
5 Correct 7 ms 1872 KB Output is correct
6 Correct 1 ms 1860 KB Output is correct
7 Correct 10 ms 1872 KB Output is correct
8 Correct 9 ms 1872 KB Output is correct
9 Correct 5 ms 1872 KB Output is correct
10 Correct 6 ms 1880 KB Output is correct

Subtask #2
70.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1872 KB Output is correct
2 Correct 4 ms 1888 KB Output is correct
3 Correct 9 ms 1872 KB Output is correct
4 Correct 9 ms 1876 KB Output is correct
5 Correct 9 ms 1872 KB Output is correct
6 Correct 1 ms 1876 KB Output is correct
7 Correct 6 ms 1872 KB Output is correct
8 Correct 4 ms 1876 KB Output is correct
9 Correct 9 ms 1876 KB Output is correct
10 Correct 7 ms 1872 KB Output is correct
11 Correct 7 ms 1848 KB Output is correct
12 Correct 6 ms 1744 KB Output is correct
13 Correct 12 ms 1872 KB Output is correct
14 Correct 7 ms 1876 KB Output is correct
15 Correct 17 ms 1876 KB Output is correct
16 Partially correct 35 ms 1904 KB Partially correct - number of queries: 5359
17 Correct 7 ms 1860 KB Output is correct
18 Partially correct 46 ms 1892 KB Partially correct - number of queries: 6199
19 Correct 20 ms 1880 KB Output is correct
20 Correct 25 ms 1872 KB Output is correct
21 Correct 24 ms 1884 KB Output is correct
22 Correct 10 ms 1876 KB Output is correct
23 Correct 6 ms 1872 KB Output is correct
24 Correct 5 ms 1872 KB Output is correct
25 Correct 31 ms 1896 KB Output is correct
26 Correct 23 ms 1868 KB Output is correct
27 Correct 9 ms 1872 KB Output is correct
28 Partially correct 44 ms 1996 KB Partially correct - number of queries: 5558
29 Correct 32 ms 1880 KB Output is correct
30 Partially correct 76 ms 1900 KB Partially correct - number of queries: 6174
31 Correct 5 ms 1876 KB Output is correct
32 Correct 8 ms 1872 KB Output is correct
33 Correct 1 ms 1872 KB Output is correct
34 Correct 21 ms 1872 KB Output is correct
35 Correct 8 ms 1872 KB Output is correct
36 Correct 20 ms 1872 KB Output is correct
37 Correct 11 ms 1872 KB Output is correct
38 Correct 7 ms 1744 KB Output is correct
39 Correct 33 ms 1880 KB Output is correct
40 Partially correct 56 ms 1876 KB Partially correct - number of queries: 5407
41 Correct 26 ms 1872 KB Output is correct
42 Correct 29 ms 2008 KB Output is correct
43 Correct 35 ms 1896 KB Output is correct
44 Correct 45 ms 1872 KB Output is correct
45 Correct 11 ms 1900 KB Output is correct
46 Correct 3 ms 2000 KB Output is correct
47 Correct 25 ms 2012 KB Output is correct
48 Correct 22 ms 1904 KB Output is correct
49 Correct 7 ms 1880 KB Output is correct
50 Partially correct 48 ms 1872 KB Partially correct - number of queries: 6186
51 Correct 21 ms 1884 KB Output is correct
52 Correct 7 ms 1872 KB Output is correct
53 Correct 10 ms 1872 KB Output is correct
54 Correct 30 ms 1872 KB Output is correct
55 Correct 6 ms 1744 KB Output is correct
56 Partially correct 57 ms 1900 KB Partially correct - number of queries: 6215
57 Correct 41 ms 1896 KB Output is correct
58 Correct 46 ms 1872 KB Output is correct
59 Correct 35 ms 2024 KB Output is correct
60 Correct 29 ms 1996 KB Output is correct
61 Correct 7 ms 1872 KB Output is correct
62 Correct 6 ms 1872 KB Output is correct
63 Correct 5 ms 1872 KB Output is correct
64 Correct 8 ms 1876 KB Output is correct
65 Correct 5 ms 1872 KB Output is correct
66 Correct 11 ms 1860 KB Output is correct
67 Correct 7 ms 1872 KB Output is correct
68 Correct 5 ms 1876 KB Output is correct
69 Correct 11 ms 1872 KB Output is correct
70 Correct 4 ms 1872 KB Output is correct
71 Partially correct 65 ms 1876 KB Partially correct - number of queries: 6962
72 Correct 11 ms 1884 KB Output is correct
73 Partially correct 58 ms 1880 KB Partially correct - number of queries: 6810
74 Partially correct 69 ms 1896 KB Partially correct - number of queries: 6884
75 Correct 8 ms 1872 KB Output is correct
76 Partially correct 51 ms 1900 KB Partially correct - number of queries: 6031
77 Partially correct 44 ms 1880 KB Partially correct - number of queries: 6944
78 Correct 15 ms 1872 KB Output is correct
79 Correct 17 ms 1896 KB Output is correct
80 Partially correct 57 ms 1884 KB Partially correct - number of queries: 6991
81 Partially correct 66 ms 1904 KB Partially correct - number of queries: 6971
82 Partially correct 30 ms 1896 KB Partially correct - number of queries: 6881
83 Correct 9 ms 1872 KB Output is correct
84 Partially correct 57 ms 1872 KB Partially correct - number of queries: 5770
85 Partially correct 51 ms 1992 KB Partially correct - number of queries: 6848
86 Correct 5 ms 1872 KB Output is correct
87 Correct 6 ms 1872 KB Output is correct
88 Correct 12 ms 1872 KB Output is correct
89 Correct 8 ms 1884 KB Output is correct
90 Correct 10 ms 1872 KB Output is correct
91 Correct 6 ms 1880 KB Output is correct
92 Correct 7 ms 1872 KB Output is correct
93 Correct 8 ms 1872 KB Output is correct
94 Correct 12 ms 1920 KB Output is correct
95 Correct 11 ms 1872 KB Output is correct
96 Correct 8 ms 1872 KB Output is correct
97 Correct 8 ms 1872 KB Output is correct