Compilare: user.cpp: In function ‘short int gety(int, int)’: user.cpp:97:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v < order[x].size() && order[x][v] == y) v++; ^ user.cpp: In function ‘short int get(int, int)’: user.cpp:104:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v < orderx.size() && orderx[v] == x) v++; ^ user.cpp: In function ‘void update(int, int)’: user.cpp:112:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v < order[x].size() && order[x][v] == y) v++; ^ user.cpp:113:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;v <= order[x].size(); v += (v & -v)) t[x][v-1]++; ^ user.cpp: In function ‘int main()’: user.cpp:118:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoo.in","r",stdin); ^ user.cpp:119:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoo.out","w",stdout); ^