Compilare: user.cpp: In function ‘void Read()’: user.cpp:49:13: warning: unused variable ‘x’ [-Wunused-variable] int x,y; ^ user.cpp:49:15: warning: unused variable ‘y’ [-Wunused-variable] int x,y; ^ user.cpp: In function ‘void BFS()’: user.cpp:82:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++) ^ user.cpp: In function ‘int solveTask2(int)’: user.cpp:100:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void Read()’: user.cpp:46:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d%d",&N,&M,&K,&L1,&C1,&L2,&C2); ^ user.cpp:50:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&Array[i].first,&Array[i].second); ^ user.cpp: In function ‘int main()’: user.cpp:118:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poarta.in","r",stdin); ^ user.cpp:119:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poarta.out","w",stdout); ^