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Submission #70151

# Submission time Handle Problem Language Result Execution time Memory
70151 2018-08-22T11:52:59 Z E869120 The Big Prize (IOI17_prize) C++14
20 / 100
 79 ms 560 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

int Rand(){
	int G=0;
	for(int i=0;i<30;i++){G+=(1<<i)*(rand()%2);}
	return G;
}

int find_best(int n) {
	int maxn=0;
	for(int i=0;i<100;i++){
		vector<int>p=ask(rand()%n);
		maxn=max(maxn,p[0]+p[1]);
	}
	int cx=0;
	for(int i=0;i<maxn;i++){
		int L=cx, R = n + 1, M, res = cx - 1;
		
		for(int j = 0; j < 20; j++) {
			M = (L + R) / 2; int MM = min(M,n-1);
			vector<int>p=ask(MM);
			if(p[0]+p[1] == maxn && p[0] == i) { res = max(res, MM); L = MM; }
			else { R = MM; }
		}
		vector<int>p = ask(res+1);
		if(p[0]==0 && p[1]==0) return res+1;
		cx=res+2;
	}
	assert(false);
	return -1;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 296 KB Output is correct
2 Correct 5 ms 312 KB Output is correct
3 Correct 4 ms 372 KB Output is correct
4 Correct 5 ms 392 KB Output is correct
5 Correct 7 ms 392 KB Output is correct
6 Correct 3 ms 448 KB Output is correct
7 Correct 4 ms 448 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 7 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 528 KB Output is correct
2 Correct 4 ms 528 KB Output is correct
3 Correct 4 ms 548 KB Output is correct
4 Correct 5 ms 548 KB Output is correct
5 Correct 3 ms 548 KB Output is correct
6 Correct 4 ms 548 KB Output is correct
7 Correct 2 ms 560 KB Output is correct
8 Correct 4 ms 560 KB Output is correct
9 Correct 5 ms 560 KB Output is correct
10 Correct 3 ms 560 KB Output is correct
11 Correct 6 ms 560 KB Output is correct
12 Correct 5 ms 560 KB Output is correct
13 Correct 13 ms 560 KB Output is correct
14 Correct 6 ms 560 KB Output is correct
15 Correct 19 ms 560 KB Output is correct
16 Partially correct 75 ms 560 KB Partially correct - number of queries: 8311
17 Correct 4 ms 560 KB Output is correct
18 Incorrect 79 ms 560 KB Incorrect
19 Halted 0 ms 0 KB -