Compilare: main.cpp: In function 'int main()': main.cpp:33:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(a[i]==')'|| a[i]==']'|| a[i]=='}') ^ main.cpp:49:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=0;i<n;i++) ^~~ main.cpp:59:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(lc>lmax) ^~ main.cpp:24:8: warning: unused variable 'ok' [-Wunused-variable] int ok=0; ^~