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Corner Twist

CF
1983B1200· pupil1s256 MB⌨ stdin/stdout
#constructive algorithms#greedy#implementation#math

Examples

Sample 1of 1
Input
7
3 3
000
000
000
111
111
111
4 4
0000
0000
0000
0000
2100
1200
0012
0021
4 4
1020
1200
1210
0000
0000
1200
2200
0000
3 3
012
012
012
010
111
011
8 8
00000000
00000000
00000000
00000000
00000000
00000000
00000000
10000000
00000000
01200000
02010000
00102000
00020100
00001020
00000210
10000000
2 7
0000000
0000000
2220111
0111222
2 7
0000000
0100010
2220111
1210202
Output
YES
YES
YES
NO
YES
NO
YES
1983B.cpp
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Ln 11·137 BGNU C++20 (64)