oj.uz

Submission #101632

# Submission time Handle Problem Language Result Execution time Memory
101632 2019-03-19T05:30:11 Z dantoh000 popa (BOI18_popa) C++14
37 / 100
 57 ms 424 KB 
#include "popa.h"
#include <bits/stdc++.h>
using namespace std;
void guess(int s, int e, int p, int* left, int* right){
    //printf("at %d %d from %d\n",s,e,p);
    if (s > e){
        left[s] = -1;
        right[s] = -1;
        return;
    }
    if (s == e){
        if (e == p-1){
            left[p] = e;
        }
        else if (s == p+1){
            right[p] = s;
        }
        left[s] = right[s] = -1;
        return;
    }
    int ans = -1;
    int m = (s+e)/2;
    for (int i = m; i <= e; i++){
        if (query(s,i,i,e)){
            ans = i;
            break;
        }
    }
    if (ans == -1){
        for (int i = s; i < m; i++){
            if (query(s,i,i,e)){
                ans = i;
                break;
            }
        }
    }
    if (e == p-1){
        left[p] = ans;
    }
    else if (s == p+1){
        right[p] = ans;
    }
    if (s <= ans-1) guess(s,ans-1,ans,left,right);
    else left[ans] = -1;
    if (ans+1 <= e) guess(ans+1,e,ans,left,right);
    else right[ans] = -1;
    return;
}
int solve(int N, int* left, int* right){
    int s;
    for (int i = 0; i < N; i++){
        if (query(0,i,i,N-1)){
            s = i;
            break;
        }
    }
    guess(0,s-1,s,left,right);
    guess(s+1,N-1,s,left,right);
  	return s;
}

Compilation message

popa.cpp: In function 'int solve(int, int*, int*)':
popa.cpp:50:9: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int s;
         ^

Subtask #1
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 384 KB Output is correct
2 Correct 47 ms 424 KB Output is correct
3 Correct 19 ms 384 KB Output is correct
4 Correct 57 ms 312 KB Output is correct

Subtask #2
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 28 ms 320 KB not a valid solution
2 Halted 0 ms 0 KB -

Subtask #3
0 / 39.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 256 KB too many queries
2 Halted 0 ms 0 KB -