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Submission #466281

# Submission time Handle Problem Language Result Execution time Memory
466281 2021-08-18T12:50:04 Z FatihSolak Aliens (IOI07_aliens) C++17
10 / 100
 2 ms 456 KB 
#include <bits/stdc++.h>
#define N 200005
#define int long long
using namespace std;
int n;
map<pair<int,int>,string> mp;
bool ask(int pos1,int pos2){
    if(mp[{pos1,pos2}] != "")return mp[{pos1,pos2}] == "true";
    if(min(pos1,pos2) < 1 || max(pos1,pos2) > n)return 0;
    cout << "examine " << pos2 << " " << pos1 << endl;
    string s;
    cin >> s;
    mp[{pos1,pos2}] = s;
    return s == "true";
}
pair<int,int> lift(int pos1,int pos2,int m,int dir1,int dir2){
    for(int i=30;i>=0;i--){
        if((1<<i) <= m && ask(pos1 + dir1*(1<<i),pos2 + dir2*(1<<i))){
            pos1 += dir1*(1<<i);
            pos2 += dir2*(1<<i);
            m    -= (1<<i);
        }
    }
    return {pos1,pos2};
}
void solve(){
    int x,y;
    cin >> n >> x >> y;
    int m = -1;
    int posx = -1,posy = -1;
    int l = lift(x,y,2e9,0,-1).second, r = lift(x,y,2e9,0,1).second;
    for(int i = 0;i<3;i++){
        for(int j = 0;j<3;j++){
            if( (i + j) > 2 || (r - l + 1)%((i+j)*2 + 1))continue;
            int tmp = (r - l + 1)/((i+j)*2 + 1);
            int tmp2 = l + 2*i*tmp;
            if(lift(x,y,tmp,0,-1).second != tmp2 || (!ask(x,tmp2 + 2*tmp) && !ask(x,tmp2 - 2*tmp)))continue;
            //assert(m == -1);
            m = tmp;
            posy = tmp2;
        }
    }
    assert(m != -1);
    posx = lift(x,y,m,-1,0).first;
    for(int i=0;i<2;i++){
        if(ask(posx - m*i*2,posy))posx -= m*i*2;
        if(ask(posx ,posy - m*i*2))posy -= m*i*2;
    }
    posx += 2*m + m/2;
    posy += 2*m + m/2;
    cout << "solution " << posy << " "  << posx << endl;
}

int32_t main(){
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 296 KB Output is correct
2 Correct 1 ms 292 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Runtime error 1 ms 456 KB Execution killed with signal 6

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 200 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 200 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 200 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 288 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 456 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 456 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Incorrect 2 ms 200 KB Incorrect
3 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 200 KB Incorrect
2 Halted 0 ms 0 KB -