Compilare: user.cpp: In function ‘void goright(int)’: user.cpp:30:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nxtpos + 1 < v.size() && v[nxtpos + 1] - pos <= d) nxtpos++; ^ user.cpp: In function ‘bool intersect(int, int)’: user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sgm.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:138:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++) ^ user.cpp:150:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++) ^ user.cpp:107:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("maestru.in", "r", stdin); ^ user.cpp:108:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("maestru.out", "w", stdout); ^ user.cpp:111:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &T); ^ user.cpp:117:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); n -= 2; ^ user.cpp:118:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &d); ^ user.cpp:120:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &st); ^ user.cpp:124:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:129:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dr); ^