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Submission #990559

# Submission time Handle Problem Language Result Execution time Memory
990559 2024-05-30T16:09:40 Z alexdd Mađioničar (COI22_madionicar) C++17
100 / 100
 1270 ms 1884 KB 
#include<bits/stdc++.h>
using namespace std;
int n,cntq;

string s;
bool verif(int le, int ri)
{
    for(int i=0;i<=ri-le;i++)
        if(s[le+i]!=s[ri-i])
            return 0;
    return 1;
}

int p[100005];
bool query(int le, int ri)
{
    if(le<1 || ri>n || le>ri)
        return 0;
    if(le==ri)
        return 1;
    cntq++;
    //return verif(le,ri);
    if(cntq>200000)
    {
        while(1);
    }
    int aux;
    cout<<"? "<<le<<" "<<ri<<endl;
    cin>>aux;
    return aux;
}
signed main()
{
    cin>>n;

    /*s.resize(n+2);
    for(int i=1;i<=n;i++)
    {
        int c = rand()%26;
        s[i] = c+'a';
    }*/

    int le,ri,mxm=1;
    le=ri=1;
    for(int i=1;i<n;i++)
    {
        p[i] = max(max(0,mxm/2), min(ri-i-1, p[le+(ri-i)-1]));
        while(query(i-p[i],i+1+p[i]))
            p[i]++;
        if(i+1+p[i] > ri)
        {
            le = i-p[i];
            ri = i+1+p[i];
        }
        mxm = max(mxm, 2*p[i]);
    }
    le=ri=1;
    for(int i=1;i<=n;i++)
    {
        p[i] = max(max(0,(mxm+1)/2), min(ri-i, p[le + (ri-i)]));
        while(query(i-p[i],i+p[i]))
            p[i]++;
        if(i+p[i] > ri)
        {
            le = i-p[i];
            ri = i+p[i];
        }
        mxm = max(mxm, 2*p[i]-1);
    }
    cout<<"! "<<mxm<<endl;
   // cout<<cntq<<" queries\n";
    return 0;
}
/**
neven

1 2 3 4 5 6 7 8 9
    l       r
    a b c b a

1 2 3 4 5 6 7 8 9
    l         r
    a b c c b a
*/

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 596 KB Output is correct
2 Correct 90 ms 592 KB Output is correct
3 Correct 72 ms 848 KB Output is correct
4 Correct 84 ms 592 KB Output is correct
5 Correct 98 ms 448 KB Output is correct
6 Correct 89 ms 848 KB Output is correct
7 Correct 34 ms 436 KB Output is correct
8 Correct 76 ms 700 KB Output is correct
9 Correct 78 ms 444 KB Output is correct
10 Correct 83 ms 436 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 596 KB Output is correct
2 Correct 90 ms 592 KB Output is correct
3 Correct 72 ms 848 KB Output is correct
4 Correct 84 ms 592 KB Output is correct
5 Correct 98 ms 448 KB Output is correct
6 Correct 89 ms 848 KB Output is correct
7 Correct 34 ms 436 KB Output is correct
8 Correct 76 ms 700 KB Output is correct
9 Correct 78 ms 444 KB Output is correct
10 Correct 83 ms 436 KB Output is correct
11 Correct 688 ms 900 KB Output is correct
12 Correct 683 ms 1380 KB Output is correct
13 Correct 850 ms 1136 KB Output is correct
14 Correct 732 ms 1236 KB Output is correct
15 Correct 725 ms 988 KB Output is correct
16 Correct 393 ms 968 KB Output is correct
17 Correct 439 ms 1232 KB Output is correct
18 Correct 784 ms 1276 KB Output is correct
19 Correct 392 ms 1016 KB Output is correct
20 Correct 826 ms 836 KB Output is correct
21 Correct 789 ms 1216 KB Output is correct
22 Correct 721 ms 832 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1270 ms 1412 KB Output is correct
2 Correct 908 ms 1380 KB Output is correct
3 Correct 1252 ms 1164 KB Output is correct
4 Correct 795 ms 1288 KB Output is correct
5 Correct 592 ms 1244 KB Output is correct
6 Correct 1224 ms 1724 KB Output is correct
7 Correct 613 ms 1096 KB Output is correct
8 Correct 1262 ms 1448 KB Output is correct
9 Correct 1263 ms 1652 KB Output is correct
10 Correct 1194 ms 1224 KB Output is correct
11 Correct 541 ms 1032 KB Output is correct
12 Correct 576 ms 1044 KB Output is correct
13 Correct 1213 ms 1112 KB Output is correct
14 Correct 1080 ms 1236 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 596 KB Output is correct
2 Correct 90 ms 592 KB Output is correct
3 Correct 72 ms 848 KB Output is correct
4 Correct 84 ms 592 KB Output is correct
5 Correct 98 ms 448 KB Output is correct
6 Correct 89 ms 848 KB Output is correct
7 Correct 34 ms 436 KB Output is correct
8 Correct 76 ms 700 KB Output is correct
9 Correct 78 ms 444 KB Output is correct
10 Correct 83 ms 436 KB Output is correct
11 Correct 688 ms 900 KB Output is correct
12 Correct 683 ms 1380 KB Output is correct
13 Correct 850 ms 1136 KB Output is correct
14 Correct 732 ms 1236 KB Output is correct
15 Correct 725 ms 988 KB Output is correct
16 Correct 393 ms 968 KB Output is correct
17 Correct 439 ms 1232 KB Output is correct
18 Correct 784 ms 1276 KB Output is correct
19 Correct 392 ms 1016 KB Output is correct
20 Correct 826 ms 836 KB Output is correct
21 Correct 789 ms 1216 KB Output is correct
22 Correct 721 ms 832 KB Output is correct
23 Correct 1270 ms 1412 KB Output is correct
24 Correct 908 ms 1380 KB Output is correct
25 Correct 1252 ms 1164 KB Output is correct
26 Correct 795 ms 1288 KB Output is correct
27 Correct 592 ms 1244 KB Output is correct
28 Correct 1224 ms 1724 KB Output is correct
29 Correct 613 ms 1096 KB Output is correct
30 Correct 1262 ms 1448 KB Output is correct
31 Correct 1263 ms 1652 KB Output is correct
32 Correct 1194 ms 1224 KB Output is correct
33 Correct 541 ms 1032 KB Output is correct
34 Correct 576 ms 1044 KB Output is correct
35 Correct 1213 ms 1112 KB Output is correct
36 Correct 1080 ms 1236 KB Output is correct
37 Correct 1191 ms 1364 KB Output is correct
38 Correct 1130 ms 1884 KB Output is correct
39 Correct 1258 ms 1292 KB Output is correct
40 Correct 1092 ms 1108 KB Output is correct
41 Correct 1056 ms 1360 KB Output is correct
42 Correct 772 ms 900 KB Output is correct
43 Correct 583 ms 804 KB Output is correct
44 Correct 1079 ms 1108 KB Output is correct
45 Correct 542 ms 1040 KB Output is correct
46 Correct 1209 ms 1500 KB Output is correct
47 Correct 1130 ms 1268 KB Output is correct
48 Correct 1123 ms 1296 KB Output is correct
49 Correct 622 ms 972 KB Output is correct
50 Correct 1161 ms 1256 KB Output is correct
51 Correct 1142 ms 1148 KB Output is correct
52 Correct 1171 ms 1208 KB Output is correct