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Java Solution for LeetCode algorithm problems, continually updating
package g1701_1800.s1706_where_will_the_ball_fall;
// #Medium #Array #Dynamic_Programming #Depth_First_Search #Matrix #Simulation
// #Level_2_Day_1_Implementation/Simulation #2022_04_24_Time_2_ms_(64.55%)_Space_54.5_MB_(25.38%)
@SuppressWarnings("java:S135")
public class Solution {
public int[] findBall(int[][] grid) {
int m = grid.length;
int n = grid[0].length;
int[] res = new int[n];
for (int j = 0; j < n; j++) {
int currentJ = j;
int currentI = 0;
while (currentJ < n && currentI < m) {
if (grid[currentI][currentJ] == 1) {
currentJ++;
if (currentJ < n && grid[currentI][currentJ] == 1) {
currentI++;
} else {
break;
}
} else {
currentJ--;
if (currentJ >= 0 && grid[currentI][currentJ] == -1) {
currentI++;
} else {
break;
}
}
}
if (currentI == m) {
res[j] = currentJ;
} else {
res[j] = -1;
}
}
return res;
}
}