Compilare: user.cpp: In function ‘void interogare(int, int, int, int, int)’: user.cpp:55:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < arb[nod].size() && ok; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:118:38: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (arb[nod].empty() && left <= NR & right <= NR) ^ user.cpp:121:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 , j = 0; i < arb[left].size() || j < arb[right].size(); ) ^ user.cpp:121:77: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 , j = 0; i < arb[left].size() || j < arb[right].size(); ) ^ user.cpp:123:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < arb[left].size() && j < arb[right].size() && arb[left][i] < arb[right][j]) ^ user.cpp:123:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < arb[left].size() && j < arb[right].size() && arb[left][i] < arb[right][j]) ^ user.cpp:127:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (i < arb[left].size() && j < arb[right].size()) ^ user.cpp:127:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (i < arb[left].size() && j < arb[right].size()) ^ user.cpp:131:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (i < arb[left].size()) ^ user.cpp:90:36: 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:91:38: 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:93:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:97:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &A[i].x, &A[i].y); ^