Compilare: user.cpp: In function ‘long long int sum(long long int, int)’: user.cpp:18:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s[y]+1LL*(c-y)*lin; ~~^~~ user.cpp: In function ‘int main()’: user.cpp:18:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s[y]+1LL*(c-y)*lin; ~~^~~ user.cpp:9:19: note: ‘y’ was declared here int st=1,dr=c,y,mij; ^ user.cpp:18:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s[y]+1LL*(c-y)*lin; ~~^~~ user.cpp:9:19: note: ‘y’ was declared here int st=1,dr=c,y,mij; ^ user.cpp:18:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s[y]+1LL*(c-y)*lin; ~~^~~ user.cpp:9:19: note: ‘y’ was declared here int st=1,dr=c,y,mij; ^ user.cpp:18:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s[y]+1LL*(c-y)*lin; ~~^~~ user.cpp:9:19: note: ‘y’ was declared here int st=1,dr=c,y,mij; ^