Compilare: user.cpp: In function ‘void tsort(int, int, int)’: user.cpp:81:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ptr < sorted[left].pos.size()) { ^ user.cpp: In function ‘void idem()’: user.cpp:122:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < principal.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:166:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < principal.size(); i++) { ^ user.cpp:173:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < principal.size(); i++) { ^ user.cpp:192:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < principal.size(); i++) { ^ user.cpp:194:46: warning: narrowing conversion of ‘i’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] sorted[size++] = (pair){power[i], i}; ^ user.cpp:154:10: warning: unused variable ‘j’ [-Wunused-variable] int i, j, find; ^