Submission #232826

# Submission time Handle Problem Language Result Execution time Memory
232826 2020-05-18T10:07:56 Z cfalas The Big Prize (IOI17_prize) C++14
100 / 100
343 ms 472108 KB
#include<bits/stdc++.h>
using namespace std;
#include "prize.h"
#define MID ((l+r)/2)
typedef vector<int> vi;
typedef pair<int, int> ii;
#define F first
#define S second

ii mem[1000000];
bool used[1000000];
set<int> s[10000000];
ii q(int x){
	if(used[x]) return mem[x];
	used[x] = true;
	vi a = ask(x);
	mem[x] = ii(a[0],a[1]);
	return mem[x];
}

int N;
int mina=0;
int rec(int l=0, int r=N-1){
	if(l>r) return -1;
	ii a = q(MID);
	if(a.F+a.S==0) return MID;

	int tot = a.F+a.S;
	auto it = s[a.F+a.S].insert(MID).F;
	if(it==s[tot].begin() || mem[*prev(it)] != mem[MID]){
		int b = rec(l,MID-1);
		if(b!=-1) return b;
	}
	if(it==--s[tot].end() || mem[*next(it)] != mem[MID]){
		int b = rec(MID+1,r);
		if(b!=-1) return b;
	}
	return -1;
}

int find_best(int n) {
	N = n;
	int l=0, r=n-1;
	int m;
	int pos=0;
	return rec();
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:43:6: warning: unused variable 'l' [-Wunused-variable]
  int l=0, r=n-1;
      ^
prize.cpp:43:11: warning: unused variable 'r' [-Wunused-variable]
  int l=0, r=n-1;
           ^
prize.cpp:44:6: warning: unused variable 'm' [-Wunused-variable]
  int m;
      ^
prize.cpp:45:6: warning: unused variable 'pos' [-Wunused-variable]
  int pos=0;
      ^~~
# Verdict Execution time Memory Grader output
1 Correct 289 ms 470008 KB Output is correct
2 Correct 285 ms 470264 KB Output is correct
3 Correct 291 ms 470136 KB Output is correct
4 Correct 298 ms 470040 KB Output is correct
5 Correct 281 ms 470136 KB Output is correct
6 Correct 289 ms 470008 KB Output is correct
7 Correct 280 ms 470136 KB Output is correct
8 Correct 292 ms 470140 KB Output is correct
9 Correct 283 ms 470008 KB Output is correct
10 Correct 282 ms 470136 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 277 ms 470136 KB Output is correct
2 Correct 289 ms 470172 KB Output is correct
3 Correct 293 ms 470144 KB Output is correct
4 Correct 286 ms 470388 KB Output is correct
5 Correct 279 ms 470136 KB Output is correct
6 Correct 281 ms 470136 KB Output is correct
7 Correct 281 ms 470212 KB Output is correct
8 Correct 278 ms 470136 KB Output is correct
9 Correct 278 ms 470136 KB Output is correct
10 Correct 278 ms 470140 KB Output is correct
11 Correct 282 ms 470392 KB Output is correct
12 Correct 274 ms 470008 KB Output is correct
13 Correct 324 ms 470904 KB Output is correct
14 Correct 284 ms 470036 KB Output is correct
15 Correct 284 ms 470392 KB Output is correct
16 Correct 326 ms 471672 KB Output is correct
17 Correct 289 ms 470128 KB Output is correct
18 Correct 343 ms 471928 KB Output is correct
19 Correct 285 ms 470136 KB Output is correct
20 Correct 305 ms 470392 KB Output is correct
21 Correct 300 ms 470904 KB Output is correct
22 Correct 280 ms 470264 KB Output is correct
23 Correct 275 ms 470008 KB Output is correct
24 Correct 290 ms 470136 KB Output is correct
25 Correct 307 ms 471012 KB Output is correct
26 Correct 303 ms 471096 KB Output is correct
27 Correct 285 ms 470136 KB Output is correct
28 Correct 315 ms 471800 KB Output is correct
29 Correct 307 ms 471672 KB Output is correct
30 Correct 317 ms 472056 KB Output is correct
31 Correct 286 ms 470112 KB Output is correct
32 Correct 284 ms 470624 KB Output is correct
33 Correct 305 ms 470008 KB Output is correct
34 Correct 302 ms 470624 KB Output is correct
35 Correct 306 ms 470392 KB Output is correct
36 Correct 297 ms 470424 KB Output is correct
37 Correct 290 ms 470136 KB Output is correct
38 Correct 279 ms 470136 KB Output is correct
39 Correct 298 ms 470952 KB Output is correct
40 Correct 317 ms 471932 KB Output is correct
41 Correct 306 ms 471236 KB Output is correct
42 Correct 307 ms 471164 KB Output is correct
43 Correct 300 ms 471160 KB Output is correct
44 Correct 301 ms 470776 KB Output is correct
45 Correct 295 ms 470652 KB Output is correct
46 Correct 278 ms 470264 KB Output is correct
47 Correct 295 ms 470776 KB Output is correct
48 Correct 312 ms 471544 KB Output is correct
49 Correct 296 ms 470136 KB Output is correct
50 Correct 319 ms 471892 KB Output is correct
51 Correct 298 ms 470776 KB Output is correct
52 Correct 269 ms 470008 KB Output is correct
53 Correct 277 ms 470392 KB Output is correct
54 Correct 290 ms 470904 KB Output is correct
55 Correct 282 ms 470156 KB Output is correct
56 Correct 343 ms 471928 KB Output is correct
57 Correct 323 ms 471416 KB Output is correct
58 Correct 315 ms 471416 KB Output is correct
59 Correct 306 ms 471160 KB Output is correct
60 Correct 310 ms 471160 KB Output is correct
61 Correct 286 ms 470392 KB Output is correct
62 Correct 274 ms 470008 KB Output is correct
63 Correct 286 ms 470392 KB Output is correct
64 Correct 309 ms 470380 KB Output is correct
65 Correct 274 ms 470136 KB Output is correct
66 Correct 276 ms 470136 KB Output is correct
67 Correct 270 ms 470136 KB Output is correct
68 Correct 276 ms 470008 KB Output is correct
69 Correct 274 ms 470136 KB Output is correct
70 Correct 276 ms 470136 KB Output is correct
71 Correct 312 ms 472108 KB Output is correct
72 Correct 281 ms 470776 KB Output is correct
73 Correct 310 ms 472056 KB Output is correct
74 Correct 304 ms 472064 KB Output is correct
75 Correct 272 ms 470392 KB Output is correct
76 Correct 316 ms 471928 KB Output is correct
77 Correct 327 ms 471928 KB Output is correct
78 Correct 278 ms 470904 KB Output is correct
79 Correct 292 ms 471800 KB Output is correct
80 Correct 301 ms 472056 KB Output is correct
81 Correct 319 ms 471928 KB Output is correct
82 Correct 323 ms 472056 KB Output is correct
83 Correct 275 ms 470264 KB Output is correct
84 Correct 302 ms 472040 KB Output is correct
85 Correct 311 ms 472056 KB Output is correct
86 Correct 285 ms 470776 KB Output is correct
87 Correct 282 ms 470520 KB Output is correct
88 Correct 273 ms 470904 KB Output is correct
89 Correct 278 ms 470648 KB Output is correct
90 Correct 274 ms 470332 KB Output is correct
91 Correct 277 ms 470392 KB Output is correct
92 Correct 274 ms 470136 KB Output is correct
93 Correct 281 ms 470520 KB Output is correct
94 Correct 277 ms 470648 KB Output is correct
95 Correct 279 ms 470648 KB Output is correct
96 Correct 273 ms 470520 KB Output is correct
97 Correct 279 ms 470136 KB Output is correct