Compilare: user.cpp: In function ‘bool check(short int, short int)’: user.cpp:55:11: warning: unused variable ‘last’ [-Wunused-variable] short last = 0; ^ user.cpp:56:11: warning: unused variable ‘PMax’ [-Wunused-variable] short PMax = -1; ^ user.cpp: In function ‘void Solve(short int, short int)’: user.cpp:116:56: warning: variable ‘fr’ set but not used [-Wunused-but-set-variable] short left = Max, right = N - 1, mid, sol = N - 1, fr = -1, frr = -1; ^ user.cpp:116:65: warning: variable ‘frr’ set but not used [-Wunused-but-set-variable] short left = Max, right = N - 1, mid, sol = N - 1, fr = -1, frr = -1; ^ user.cpp: In function ‘void DFS(short int)’: user.cpp:160:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short i = 0; i < G[node].size(); i++) ^ user.cpp:167:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(short i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void printSolution()’: user.cpp:193:15: warning: unused variable ‘cnt’ [-Wunused-variable] short cnt = 0; ^ user.cpp: In function ‘int main()’: user.cpp:220:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("optic.out", "w", stdout); ^