Compilare: main.cpp: In function 'int main()': main.cpp:29:8: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (p == 1) forn(i, 0, n) forn(j, 0, m) if (i != l || j != c) cnt += w[i][j]; ^ main.cpp:12:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("panda.in", "rt", stdin); ^ main.cpp:13:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("panda.out", "wt", stdout); ^