Compilare: main.cpp: In function 'int main()': main.cpp:14:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;(1<<i)<=x;i++){ ~~~~~~^~~ main.cpp:15:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if (((1<<i)&x)>0) ^~ main.cpp:17:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' a=(a*a)%m; ^