Compilare: user.cpp: In function ‘void explore(pair, pair)’: user.cpp:62:20: warning: unused variable ‘loc’ [-Wunused-variable] pair node, next, loc; ^ user.cpp: In function ‘int main()’: user.cpp:95:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &N, &M); ^ user.cpp:98:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &bit[i][j]); ^ user.cpp:107:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.out", "w", stdout); ^