Compilare: user.cpp: In function ‘void readFile()’: user.cpp:46:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz[nr][++ pz[nr]] = {i, j}; ^ user.cpp: In function ‘void solve()’: user.cpp:137:13: warning: unused variable ‘j’ [-Wunused-variable] int j; ^ user.cpp: In function ‘void readFile()’: user.cpp:37:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:44:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &nr); ^ user.cpp: In function ‘void doCycle(int, elem)’: user.cpp:73:24: warning: array subscript is above array bounds [-Warray-bounds] poz2 = poz[i][2]; ^ user.cpp: In function ‘void solve()’: user.cpp:130:39: warning: array subscript is above array bounds [-Warray-bounds] if(poz[i][1].i == poz[i][2].i) ^