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Submission #371456

# Submission time Handle Problem Language Result Execution time Memory
371456 2021-02-26T16:23:13 Z urd05 The Big Prize (IOI17_prize) C++14
20 / 100
 1000 ms 1260 KB 
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

int save[200000];
int ret;

int f(int i) {
    if (save[i]!=-1) {
        return save[i];
    }
    vector<int> v=ask(i);
    if (v[0]==0&&v[1]==0) {
        ret=i;
    }
    return save[i]=v[1];
}

int find_best(int n) {
    ret=-1;
    int now=0;
    memset(save,-1,sizeof(save));
    if (f(now)==0) {
        return now;
    }
    while (1) {
        int lo=now; //f(lo)!=0
        int hi=n;
        while (lo+1<hi) {
            int mid=(lo+hi)/2;
            if (f(mid)!=0) {
                lo=mid;
            }
            else {
                hi=mid;
            }
            if (ret!=-1) {
                return ret;
            }
        }
    }
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 1 ms 1260 KB Output is correct
4 Correct 1 ms 1260 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 1 ms 1132 KB Output is correct
7 Correct 1 ms 1132 KB Output is correct
8 Correct 1 ms 1260 KB Output is correct
9 Correct 1 ms 1132 KB Output is correct
10 Correct 1 ms 1132 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 1 ms 1132 KB Output is correct
4 Correct 1 ms 1132 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 1 ms 1132 KB Output is correct
7 Correct 1 ms 1132 KB Output is correct
8 Correct 1 ms 1132 KB Output is correct
9 Correct 1 ms 1132 KB Output is correct
10 Correct 1 ms 1132 KB Output is correct
11 Execution timed out 3023 ms 1132 KB Time limit exceeded
12 Halted 0 ms 0 KB -