Compilare: main.cpp: In function 'void precalc(int, int)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:30:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:67:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:140:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v[nod].size() ; i++){ ~~^~~~~~~~~~~~~~~ main.cpp:147:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < cresc[vecin].size() ; j++){ ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:151:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j >= cresc[nod].size()){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:160:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < des[vecin].size() ; j++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:164:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j >= des[nod].size()){ ~~^~~~~~~~~~~~~~~~~~ main.cpp:191:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr + 1 < cresc[nod].size()) ~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:207:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr + 1 < des[nod].size()) ~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:219:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:221:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&val[i]); ^ main.cpp:224:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^