Compilare: main.cpp: In function 'int who(int)': main.cpp:95:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] return ans; ^~~ main.cpp: In function 'int main()': main.cpp:137:47: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] update(1, 1, p, 1, who(r[i].y), 1); ^ main.cpp:136:47: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] update(1, 1, p, 1, who(it->y), -1); ^ main.cpp:134:44: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] update(1, 1, p, 1, who(r[i].y), -1); ^ main.cpp:133:42: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] update(1, 1, p, 1, who(it->y), 1); ^