Compilare: user.cpp: In function ‘int main()’: user.cpp:18:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n*(n+1)/2; ++i) f >> a[i]; ^ user.cpp:19:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = (n-1)*(n-1)/2 + 1; i <= n*(n+1)/2; ++i) b[i] = 1; ^ user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = st - 1; k <= dr; ++k) ^ user.cpp:54:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n - 2; ++i) ^ user.cpp:56:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k >= st) g << poz << ' '; ^ user.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz != v[ant++]) dif = 1; ^ user.cpp:63:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(b[j1] >= st2) ^ user.cpp:86:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k >= st) g << poz << ' '; ^ user.cpp:87:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz != v[ant++]) dif = 1; ^ user.cpp:89:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k >= st) ^