Compilare: main.cpp: In function 'Mint solve(int)': main.cpp:157:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] int m = l + r >> 1; ~~^~~ main.cpp: In function 'int main()': main.cpp:10:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] #define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);} ^ main.cpp:198:9: note: in expansion of macro 'FO' FO(papagali); ^~ main.cpp:10:71: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] #define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);} ^ main.cpp:198:9: note: in expansion of macro 'FO' FO(papagali); ^~