Compilare: main.cpp: In function 'int Update(int, int, int)': main.cpp:88:88: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(T[node].val > T[2 * node + 1].val || T[2 * node].val == T[2 * node + 1].val && T[2 * node].index > T[2 * node + 1].index){ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:93:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int Query(int, int, int)': main.cpp:97:60: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(ans.val > T[node].val || ans.val == T[node].val && ans.index > T[node].index){ ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:106:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void Read(int&)': main.cpp:35:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:40:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp: In function 'int binsearch(int, int, int)': main.cpp:75:12: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^~~~ main.cpp: In function 'int main()': main.cpp:128:18: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] A = 1; B = binsearch(1, N, v[i].x); ~~^~~~~~~~~~~~~~~~~~~~~~~~~