Compilare: main.cpp: In function 'bool solve(int, int)': main.cpp:58:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 58 | return can[a][b] = 0; | ~~~~~~~~~~^~~ main.cpp:60:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 60 | return can[a][b] = 1; | ~~~~~~~~~~^~~ main.cpp:96:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | if (nr == son2.size()) | ~~~^~~~~~~~~~~~~~ main.cpp:97:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 97 | return can[a][b] = 1; | ~~~~~~~~~~^~~ main.cpp:99:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 99 | return can[a][b] = 0; | ~~~~~~~~~~^~~