Compilare: main.cpp: In function 'void dfs1(int, int)': main.cpp:129:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tree[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int, int)': main.cpp:181:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tree[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp:192:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tree[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void buildhld(int, int, int, int)': main.cpp:214:37: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] aint[nod + stp] = aint[nod << 1 + stp] | aint[nod << 1|1 + stp]; ~~^~~~~ main.cpp:214:62: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses] aint[nod + stp] = aint[nod << 1 + stp] | aint[nod << 1|1 + stp]; ~~^~~~~ main.cpp: In function 'void updatehld(int, int, int, int, int)': main.cpp:244:37: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] aint[nod + stp] = aint[nod << 1 + stp] | aint[nod << 1|1 + stp]; ~~^~~~~ main.cpp:244:62: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses] aint[nod + stp] = aint[nod << 1 + stp] | aint[nod << 1|1 + stp]; ~~^~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:13:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^