Compilare: user.cpp: In function ‘int main()’: user.cpp:116:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ydist.in", "r", stdin); ^ user.cpp:117:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ydist.out", "w", stdout); ^ user.cpp:120:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &Q); ^ user.cpp:122:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &P[i].x, &P[i].y), P[i].ind = -i; ^ user.cpp:124:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &P[i + N].x, &P[i + N].y), P[i + N].ind = i; ^