Compilare: main.cpp: In function 'void bfs()': main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < T[x].size() ; j ++) ~~^~~~~~~~~~~~~ main.cpp:23:15: warning: unused variable 'z' [-Wunused-variable] int x, y, z, j; ^ main.cpp: In function 'int solve(int)': main.cpp:64:25: warning: unused variable 'l' [-Wunused-variable] int i, nr, x, y, z, l, aux; ^ main.cpp:64:28: warning: unused variable 'aux' [-Wunused-variable] int i, nr, x, y, z, l, aux; ^~~ main.cpp: In function 'int main()': main.cpp:132:27: warning: unused variable 'k' [-Wunused-variable] int t, x, y, z, i, j, k; ^ main.cpp:130:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rege2.in", "r", stdin); ^ main.cpp:131:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rege2.out", "w", stdout); ^ main.cpp:133:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:136:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &sum); ^ main.cpp:140:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &z); ^