Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:32:22: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses] 32 | if (!dp[node][j] == -1) dp[node][j] = mods; | ^~ main.cpp:32:9: note: add parentheses around left hand side expression to silence this warning 32 | if (!dp[node][j] == -1) dp[node][j] = mods; | ^~~~~~~~~~~~ | ( ) main.cpp:32:22: warning: comparison of constant '-1' with boolean expression is always false [-Wbool-compare] 32 | if (!dp[node][j] == -1) dp[node][j] = mods; | ~~~~~~~~~~~~~^~~~~