Compilare: user.cpp: In function ‘int main()’: user.cpp:90:6: warning: unused variable ‘q’ [-Wunused-variable] int q, i, n, m, p, k, a, source, sink; ^ user.cpp:90:18: warning: unused variable ‘p’ [-Wunused-variable] int q, i, n, m, p, k, a, source, sink; ^ user.cpp:90:21: warning: unused variable ‘k’ [-Wunused-variable] int q, i, n, m, p, k, a, source, sink; ^ user.cpp:85:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in", "r", stdin); ^ user.cpp:86:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out", "w", stdout); ^