Compilare: main.cpp: In function 'void tarjan(int)': main.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[v].size(); i++) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void drum_ctc(int, int)': main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p = 0; p < sol[i].size(); p++) { ~~^~~~~~~~~~~~~~~ main.cpp:68:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < l[v].size(); k++) { ~~^~~~~~~~~~~~~ main.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < l2[v].size(); k++) { ~~^~~~~~~~~~~~~~ main.cpp: In function 'void bf(int)': main.cpp:103:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ls[v].size(); i++) { ~~^~~~~~~~~~~~~~ main.cpp:110:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ls2[v].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void citire_graf()': main.cpp:31:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ main.cpp:33:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &x, &y); ^ main.cpp: In function 'int main()': main.cpp:129:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &t); ^ main.cpp:131:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &x, &y); ^