Compilare: user.cpp: In function ‘std::vector<str> divide(int, int, int)’: user.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x<q1.size() && q1[x].x<i/2) x++; ^ user.cpp:56:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<q1.size() || j<q2.size()) ^ user.cpp:56:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<q1.size() || j<q2.size()) ^ user.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==q2.size()) q.push_back(q1[i++]); ^ user.cpp:59:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(i==q1.size()) q.push_back(q2[j++]); ^ user.cpp: In function ‘int main()’: user.cpp:110:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easyvect.in", "r", stdin); ^ user.cpp:111:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easyvect.out", "w", stdout); ^ user.cpp:113:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d",&t);t;t--) ^ user.cpp:116:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:119:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&val[i]); ^ user.cpp:126:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^