Compilare: user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:50:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<arb[nod].size() && ok; ++i) ^ user.cpp: In function ‘void arbore()’: user.cpp:81:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arb[2*nod].size() || j<arb[2*nod+1].size()) ^ user.cpp:81:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<arb[2*nod].size() || j<arb[2*nod+1].size()) ^ user.cpp:83:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<arb[2*nod].size() && j<arb[2*nod+1].size() && arb[2*nod][i]<arb[2*nod+1][j]) ^ user.cpp:83:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<arb[2*nod].size() && j<arb[2*nod+1].size() && arb[2*nod][i]<arb[2*nod+1][j]) ^ user.cpp:85:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i<arb[2*nod].size() && j<arb[2*nod+1].size() && arb[2*nod][i]>arb[2*nod+1][j]) ^ user.cpp:85:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i<arb[2*nod].size() && j<arb[2*nod+1].size() && arb[2*nod][i]>arb[2*nod+1][j]) ^ user.cpp:87:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i<arb[2*nod].size()) ^ user.cpp: In function ‘int main()’: user.cpp:117:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana2.in","r",stdin); ^ user.cpp:118:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana2.out","w",stdout); ^ user.cpp:119:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:121:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&v[i].x,&v[i].y); ^