Compilare: main.cpp: In function 'int main()': main.cpp:37:8: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(j==i) ^ main.cpp:16:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;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(gasit) ^~ main.cpp:63:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ~^~~~~~~~~~~