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Submission #1048451

# Submission time Handle Problem Language Result Execution time Memory
1048451 2024-08-08T07:41:35 Z pcc The Big Prize (IOI17_prize) C++17
20 / 100
 120 ms 4452 KB 
#include "prize.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;


template <typename T>
using ordered_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
#define pii pair<int,int>
#define fs first
#define sc second

#ifdef LOCAL
const int lim = 3;
const int dt = 5;
#else
const int lim = 5000;
const int dt = 50;
#endif

const int mxn = 2e5+10;
pii dp[mxn];
int N;
int big = 1e9;
int ans = 0;
bool done = false;
int C = 0;
ordered_set<int> st;

pii req(int p){
	if(dp[p].fs != -1)return dp[p];
	C++;
	assert(C<=10000);
	auto re = ask(p);
	return (dp[p] = pii(re[0],re[1]));
}

int check(int p){
	auto re = req(p);
	if(!re.fs&&!re.sc)return 0;
	else if(N-re.fs-re.sc == big)return 2;
	else{
		st.insert(p);
		return 1;
	}
}

void dfs(int l,int r){
	if(done)return;
	cerr<<"DFS: "<<l<<','<<r<<endl;
	while(l<=r){
		if(!check(l)){
			ans = l;
			done = true;
			return;
		}
		else if(check(l) == 1){
			l++;
		}
		else break;
	}
	while(l<=r){
		if(!check(r)){
			ans = r;
			done = true;
			return;
		}
		else if(check(r) == 1){
			r--;
		}
		else break;
	}
	if(l>=r)return;
	int cnt = req(r).fs+req(l).sc-(N-big);
	if(!cnt)return;
	cerr<<"CHECK: "<<l<<','<<r<<','<<cnt<<endl;
	assert(cnt>0);
	int mid = (l+r)>>1;
	if(check(mid) == 0){
		ans = mid;
		done = true;
		return;
	}
	if(l == r)return;
	if(l != mid)dfs(l,mid);
	if(mid != r)dfs(mid,r);
	return;
}

int find_best(int nn) {
	srand(time(NULL));
	N = nn;
	int pt = 0;
	for(int i = 1;i*i<2e5;i++)pt = i;
	cerr<<pt<<endl;
	for(auto &i:dp)i = pii(-1,-1);
	if(N<=lim){
		for(int i = 0;i<N;i++){
			auto tmp = req(i);
			if(!tmp.fs&&!tmp.sc)return i;
		}
		assert(false);
		return 0;
	}
	for(int i = 0;i<dt;i++){
		auto tmp = req(rand()%N);
		big = min(big,N-tmp.fs-tmp.sc);
	}
	cerr<<"BIG: "<<big<<endl;
	dfs(0,N-1);
	if(!done)exit(0);
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1880 KB Output is correct
2 Correct 2 ms 1880 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 1 ms 1880 KB Output is correct
5 Correct 1 ms 1880 KB Output is correct
6 Correct 1 ms 1880 KB Output is correct
7 Correct 1 ms 1972 KB Output is correct
8 Correct 1 ms 1880 KB Output is correct
9 Correct 1 ms 1976 KB Output is correct
10 Correct 2 ms 1880 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1880 KB Output is correct
2 Correct 2 ms 1880 KB Output is correct
3 Correct 2 ms 1880 KB Output is correct
4 Correct 1 ms 1880 KB Output is correct
5 Correct 1 ms 1880 KB Output is correct
6 Correct 1 ms 1880 KB Output is correct
7 Correct 1 ms 1880 KB Output is correct
8 Correct 1 ms 1880 KB Output is correct
9 Correct 1 ms 1880 KB Output is correct
10 Correct 1 ms 1880 KB Output is correct
11 Correct 5 ms 1880 KB Output is correct
12 Correct 2 ms 1972 KB Output is correct
13 Correct 13 ms 1880 KB Output is correct
14 Correct 4 ms 1880 KB Output is correct
15 Correct 12 ms 1880 KB Output is correct
16 Correct 70 ms 2136 KB Output is correct
17 Correct 1 ms 1880 KB Output is correct
18 Correct 79 ms 2384 KB Output is correct
19 Correct 1 ms 1880 KB Output is correct
20 Correct 22 ms 2136 KB Output is correct
21 Correct 31 ms 2056 KB Output is correct
22 Correct 10 ms 1880 KB Output is correct
23 Correct 1 ms 1880 KB Output is correct
24 Correct 1 ms 1880 KB Output is correct
25 Correct 37 ms 2080 KB Output is correct
26 Correct 37 ms 1880 KB Output is correct
27 Correct 3 ms 1880 KB Output is correct
28 Correct 77 ms 2192 KB Output is correct
29 Correct 55 ms 2068 KB Output is correct
30 Correct 106 ms 2420 KB Output is correct
31 Correct 1 ms 1880 KB Output is correct
32 Correct 7 ms 2020 KB Output is correct
33 Correct 1 ms 1880 KB Output is correct
34 Correct 31 ms 2136 KB Output is correct
35 Correct 3 ms 2136 KB Output is correct
36 Correct 21 ms 1880 KB Output is correct
37 Correct 3 ms 1880 KB Output is correct
38 Correct 1 ms 1880 KB Output is correct
39 Correct 35 ms 2052 KB Output is correct
40 Correct 70 ms 2128 KB Output is correct
41 Correct 45 ms 2312 KB Output is correct
42 Correct 44 ms 1880 KB Output is correct
43 Correct 41 ms 1880 KB Output is correct
44 Correct 30 ms 1880 KB Output is correct
45 Correct 25 ms 1880 KB Output is correct
46 Correct 2 ms 1880 KB Output is correct
47 Correct 38 ms 2024 KB Output is correct
48 Correct 66 ms 2516 KB Output is correct
49 Correct 12 ms 1880 KB Output is correct
50 Correct 79 ms 2420 KB Output is correct
51 Correct 34 ms 1880 KB Output is correct
52 Correct 2 ms 1880 KB Output is correct
53 Correct 4 ms 1880 KB Output is correct
54 Correct 35 ms 2184 KB Output is correct
55 Correct 2 ms 1880 KB Output is correct
56 Correct 78 ms 2384 KB Output is correct
57 Correct 56 ms 2136 KB Output is correct
58 Correct 57 ms 2264 KB Output is correct
59 Correct 46 ms 2296 KB Output is correct
60 Correct 44 ms 2140 KB Output is correct
61 Correct 3 ms 1880 KB Output is correct
62 Correct 1 ms 1880 KB Output is correct
63 Correct 3 ms 1880 KB Output is correct
64 Correct 2 ms 1880 KB Output is correct
65 Correct 1 ms 1968 KB Output is correct
66 Correct 1 ms 1880 KB Output is correct
67 Correct 3 ms 2224 KB Output is correct
68 Correct 3 ms 1880 KB Output is correct
69 Correct 1 ms 1972 KB Output is correct
70 Correct 2 ms 1880 KB Output is correct
71 Correct 120 ms 2128 KB Output is correct
72 Correct 10 ms 1880 KB Output is correct
73 Correct 87 ms 2244 KB Output is correct
74 Correct 105 ms 2284 KB Output is correct
75 Correct 3 ms 1880 KB Output is correct
76 Correct 79 ms 2136 KB Output is correct
77 Correct 83 ms 2272 KB Output is correct
78 Correct 9 ms 1880 KB Output is correct
79 Correct 42 ms 1880 KB Output is correct
80 Correct 88 ms 2384 KB Output is correct
81 Correct 88 ms 2136 KB Output is correct
82 Correct 81 ms 2128 KB Output is correct
83 Correct 3 ms 1880 KB Output is correct
84 Correct 70 ms 2008 KB Output is correct
85 Correct 83 ms 2580 KB Output is correct
86 Runtime error 41 ms 4452 KB Execution killed with signal 6
87 Halted 0 ms 0 KB -