Compilare: user.cpp: In function ‘int main()’: user.cpp:137:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); ++i) ^ user.cpp:110:23: warning: ‘inv10mod2’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr2 = (1LL * nr2 * inv10mod2) % mod2; ^ user.cpp:109:23: warning: ‘inv10mod1’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr1 = (1LL * nr1 * inv10mod1) % mod1; ^ user.cpp:69:23: warning: ‘inv2mod2’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr2 = (1LL * nr2 * inv2mod2) % mod2; ^ user.cpp:68:23: warning: ‘inv2mod1’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr1 = (1LL * nr1 * inv2mod1) % mod1; ^