Compilare: main.cpp: In function 'int main()': main.cpp:8:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("readunare.in", "r", stdin) ; ^ main.cpp:9:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("readunare.out", "w", stdout) ; ^ main.cpp:31:23: warning: 'nrb' may be used uninitialized in this function [-Wmaybe-uninitialized] std::cout << dp[nra + nrb] ; ~~~~^~~~~ main.cpp:31:23: warning: 'nra' may be used uninitialized in this function [-Wmaybe-uninitialized]