Compilare: user.cpp: In function ‘long long int cost(long long int, long long int, int)’: user.cpp:31:6: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(int i = r + 1; i <= n; ++i) ^~~ user.cpp:33:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ return sact; ^~~~~~ user.cpp: In function ‘int main()’: user.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vs.size()-1;++j) ~^~~~~~~~~~~~ user.cpp: In function ‘long long int cost(long long int, long long int, int)’: user.cpp:20:24: warning: ‘cnt’ may be used uninitialized in this function [-Wmaybe-uninitialized] ++cnt; ^