Compilare: user.cpp: In function ‘int main()’: user.cpp:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < sol.size() ; i++) ~~^~~~~~~~~~~~ user.cpp: In function ‘int mikasaesucasa()’: user.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:43:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mexitate.in","r",stdin); ^ user.cpp:44:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mexitate.out","w",stdout); ^ user.cpp:46:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&m,&n,&k,&l); ^ user.cpp:50:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp: In function ‘int mikasaesucasa()’: user.cpp:35:19: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] int pos = LIM*r; ^ user.cpp: In function ‘int main()’: user.cpp:35:19: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] int pos = LIM*r; ^ user.cpp:28:9: note: ‘r’ was declared here int r; ^ user.cpp:35:19: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] int pos = LIM*r; ^ user.cpp:28:9: note: ‘r’ was declared here int r; ^