Compilare: user.cpp: In function ‘void sortBand()’: user.cpp:66:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < V.size() - 1; i++) ^ user.cpp: In function ‘int findBand(std::pair<double, double>)’: user.cpp:91:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol == V.size() - 1) ^ user.cpp: In function ‘void binarySearch(std::pair<double, double>)’: user.cpp:104:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sol + s >= Band[poz].size()) ^ user.cpp:101:9: warning: unused variable ‘left’ [-Wunused-variable] int left = 0, right = Band[poz].size() - 1, mid, sol = -1; ^ user.cpp:101:19: warning: unused variable ‘right’ [-Wunused-variable] int left = 0, right = Band[poz].size() - 1, mid, sol = -1; ^ user.cpp:101:49: warning: unused variable ‘mid’ [-Wunused-variable] int left = 0, right = Band[poz].size() - 1, mid, sol = -1; ^ user.cpp: In function ‘void Read()’: user.cpp:18:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:20:80: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&Point[i].first,&Point[i].second), Abs[Point[i].first] = 1; ^ user.cpp: In function ‘int main()’: user.cpp:126:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poligon.in","r",stdin); ^ user.cpp:134:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p.first, &p.second); ^