Compilare: user.cpp: In function ‘int main()’: user.cpp:24:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("cartite.in", "r",stdin); ^ user.cpp:25:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cartite.out", "w",stdout); ^ user.cpp:27:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d", &cer, &n, &m, &xc, &yc, &k); ^ user.cpp:29:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &r); ^ user.cpp:47:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nrg); ^ user.cpp:49:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &x1, &y1, &x2, &y2); ^ user.cpp:99:15: warning: ‘pas’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d %d", ll, cc, pas-1); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:101:25: warning: ‘cc’ may be used uninitialized in this function [-Wmaybe-uninitialized] s.push(f[ll*1000+cc]); ~~~~~~~^~~ user.cpp:101:20: warning: ‘ll’ may be used uninitialized in this function [-Wmaybe-uninitialized] s.push(f[ll*1000+cc]); ~~^~~~~