Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:83:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(mat[i].hi >= val || p < 64 && mat[i].lo >= val){ ^ user.cpp:83:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(mat[i].hi >= val || p < 64 && mat[i].lo >= val){ ^ user.cpp:83:47: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(mat[i].hi >= val || p < 64 && mat[i].lo >= val){ ^ user.cpp:93:32: error: ‘strrev’ was not declared in this scope fout << strrev(sol[i].a) << " "; ^