Compilare: user.cpp: In function ‘int main()’: user.cpp:98:52: warning: operation on ‘kkk’ may be undefined [-Wsequence-point] sp[++kkk]=sp[kkk-1]+sol[i-1].y-sol[i].y; ^ user.cpp:63:52: warning: variable ‘jj’ set but not used [-Wunused-but-set-variable] int n,k,s,i,kk,x,j,ss=0,kkk,poz,nr=0,maxx=0,ii,jj; ^ user.cpp:61:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("telecab.in", "r",stdin); ^ user.cpp:62:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("telecab.out", "w",stdout); ^ user.cpp:64:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &s); ^ user.cpp:66:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:112:23: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i<=ii && ii<=j) ^ user.cpp:112:13: warning: ‘ii’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i<=ii && ii<=j) ^ user.cpp:99:15: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=2; i<=poz; i++) ^