/
1222.cpp
177 lines (175 loc) · 5.96 KB
/
1222.cpp
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__________________________________________________________________________________________________
sample 0 ms submission
class Solution {
public:
vector<vector<int>> queensAttacktheKing(vector<vector<int>>& queens, vector<int>& king) {
vector<vector<int>> ans;
vector<vector<int>> b(8, vector<int>(8, 0));
for(auto& q: queens) b[q[0]][q[1]] = 1;
int x = king[0], y = king[1];
for(int i = x, j = y; j < 8; j++) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j});break;}
for(int i = x, j = y; j >= 0; j--) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
for(int i = x, j = y; i >= 0; i--) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
for(int i = x, j = y; i < 8; i++) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j});break;}
for(int i = x, j = y; i < 8 && j < 8; i++, j++) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
for(int i = x, j = y; i < 8 && j >= 0; i++, j--) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
for(int i = x, j = y; i >= 0 && j < 8; i--, j++) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
for(int i = x, j = y; i >= 0 && j >= 0; i--, j--) if (b[i][j] == 1) {ans.push_back(vector<int>{i, j}); break;}
return ans;
}
};
__________________________________________________________________________________________________
sample 4 ms submission
class Solution {
public:
vector<int> king;
vector<vector<int>> queensAttacktheKing(vector<vector<int>>& queens, vector<int>& king) {
vector<vector<int>> res;
// Queens in same row of king (left+ right)
// Queens in same col of king(up and down)
// Queens in diagonal
// queens in anti diagonal
this->king=king;
for( const auto & queen : queens) {
if( king[0]==queen[0] && queen[1] > king[1] ) {
rowRight.emplace_back(queen);
}
if( king[0]==queen[0] && queen[1] < king[1] ) {
rowLeft.emplace_back(queen);
}
if( king[1]==queen[1] && queen[0] > king[0] ) {
colRight.emplace_back(queen);
}
if( king[1]==queen[1] && queen[0] < king[0] ) {
colLeft.emplace_back(queen);
}
if( king[1]+king[0]==queen[1]+queen[0] && queen[1] < king[1] ) {
diagLeft.emplace_back(queen);
}
if( king[1]+king[0]==queen[1]+queen[0] && queen[1] > king[1] ) {
diagRight.emplace_back(queen);
}
if( king[1]-king[0]==queen[1]-queen[0] && queen[1] < king[1] ) {
aDiagLeft.emplace_back(queen);
}
if( king[1]-king[0]==queen[1]-queen[0] && queen[1] > king[1] ) {
aDiagRight.emplace_back(queen);
}
}
if(rowLeft.size()) res.emplace_back(minDistance(rowLeft));
if(rowRight.size()) res.emplace_back(minDistance(rowRight));
if(colLeft.size()) res.emplace_back(minDistance(colLeft));
if(colRight.size()) res.emplace_back(minDistance(colRight));
if(diagLeft.size()) res.emplace_back(minDistance(diagLeft));
if(diagRight.size()) res.emplace_back(minDistance(diagRight));
if(aDiagLeft.size()) res.emplace_back(minDistance(aDiagLeft));
if(aDiagRight.size()) res.emplace_back(minDistance(aDiagRight));
return res;
}
vector<int> minDistance(vector<vector<int>>& queens ) {
vector<int> minQ=queens[0];
for( auto const& queen : queens) {
if( (abs(king[0]-queen[0]) + abs(king[1]-queen[1]) ) <
( abs(king[0]-minQ[0]) + abs(king[1]-minQ[1]) ) ) {
minQ=queen;
}
}
return minQ;
}
vector<vector<int>> rowLeft,rowRight,colLeft,colRight,diagLeft,diagRight,aDiagLeft,aDiagRight;
};
__________________________________________________________________________________________________
sample 8 ms submission
class Solution {
public:
vector<vector<int>> queensAttacktheKing(vector<vector<int>>& queens, vector<int>& king) {
vector<vector<int>>ans;
int r = king[0];
int c = king[1];
int n =8;
int m = 8;
vector< vector<int>>vis(n,vector<int>(m,0));
for(int i=0;i<queens.size();i++)
{
vis[queens[i][0]][queens[i][1]]++;
}
//col
for(int i=r+1;i<n;i++)
{
if(vis[i][c])
{
ans.push_back({i,c});
break;
}
}
for(int i=r-1;i>=0;i--)
{
if(vis[i][c])
{
ans.push_back({i,c});
break;
}
}
for(int i=c+1;i<m;i++)
{
if(vis[r][i])
{
ans.push_back({r,i});
break;
}
}
for(int i=c-1;i>=0;i--)
{
if(vis[r][i])
{
ans.push_back({r,i});
break;
}
}
int nr=r+1,nc=c+1;
while(nr<n && nc<m)
{
if(vis[nr][nc])
{
ans.push_back({nr,nc});
break;
}
nr++;
nc++;
}
nr=r-1,nc=c-1;
while(nr>=0 && nc>=0)
{
if(vis[nr][nc])
{
ans.push_back({nr,nc});
break;
}
nr--;
nc--;
}
nr=r-1,nc=c+1;
while(nr>=0 && nc<m)
{
if(vis[nr][nc])
{
ans.push_back({nr,nc});
break;
}
nr--;
nc++;
}
nr=r+1,nc=c-1;
while(nr<n && nc>=0)
{
if(vis[nr][nc])
{
ans.push_back({nr,nc});
break;
}
nr++;
nc--;
}
return ans;
}
};