Compilare: main.cpp: In function 'int32_t main()': main.cpp:90:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; ++i) main.cpp:307:8: for0(i, mlc.size()) ordine[mlc[i].x][mlc[i].y] = i; ~~~~~~~~~~~~~ main.cpp:307:3: note: in expansion of macro 'for0' for0(i, mlc.size()) ordine[mlc[i].x][mlc[i].y] = i; ^~~~ main.cpp:268:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".out", "w", stdout); ^ main.cpp:269:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".in", "r", stdin); ^