Compilare: main.cpp: In function 'bool solve(int, int)': main.cpp:57:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 57 | return can[a][b] = 0; | ~~~~~~~~~~^~~ main.cpp:59:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 59 | return can[a][b] = 1; | ~~~~~~~~~~^~~ main.cpp:94:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 94 | if (nr == son2.size()) | ~~~^~~~~~~~~~~~~~ main.cpp:95:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 95 | return can[a][b] = 1; | ~~~~~~~~~~^~~ main.cpp:97:22: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 97 | return can[a][b] = 0; | ~~~~~~~~~~^~~