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Submission #466422

# Submission time Handle Problem Language Result Execution time Memory
466422 2021-08-19T07:42:39 Z FatihSolak Aliens (IOI07_aliens) C++17
100 / 100
 2 ms 200 KB 
#include <bits/stdc++.h>
using namespace std;
int n,x,y;
bool ask(int pos1,int pos2){
    if(min(pos1,pos2) < 1 || max(pos1,pos2) > n)return 0;
    cout << "examine " << pos1 << " " << pos2 << endl;
    string s;
    cin >> 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 make_pair(pos1,pos2);
}
pair<int,int> find(int pos1,int pos2,int dir1,int dir2){
    for(int i = 1;;i*=2){
        if(!ask(pos1 + dir1*i,pos2+dir2*i)){
            return lift(pos1,pos2,i,dir1,dir2);
        }
    }
}
int main(){
    cin >> n >> x >> y;
    int m = -1;
    int posx = -1,posy = -1;
    int l = find(x,y,-1,0).first, r = find(x,y,1,0).first;
    m = r-l+1;
    posx = l;
    posy = lift(x,y,m,0,-1).second;
    for(int i=0;i<2;i++){
        if(ask(posx - m*2,posy))posx -= m*2;
        if(ask(posx ,posy - m*2))posy -= m*2;
    }
    if(ask(posx - m,posy-m)){
        posx -= m;
        posy -= m;
    }
    posx += 2*m + m/2;
    posy += 2*m + m/2;
    cout << "solution " << posx << " "  << posy << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 2 ms 200 KB Output is correct

Subtask #7
10.0 / 10.0

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

Subtask #8
10.0 / 10.0

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

Subtask #9
10.0 / 10.0

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

Subtask #10
10.0 / 10.0

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