Compilare: main.cpp: In function 'void bfs(int)': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<muchii[u].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void belford(int, int)': main.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[u].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'bool dijkstra(int, int)': main.cpp:88:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[u.nod].size(); i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:147:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=u+1; i<=u+muchii[x].size(); i++){ ~^~~~~~~~~~~~~~~~~~~~ main.cpp:118:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("atac2.in", "r", stdin); ^ main.cpp:119:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("atac2.out", "w", stdout); ^ main.cpp:121:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &m, &u, &x); ^ main.cpp:123:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &oras[i]); ^ main.cpp:125:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x1, &y); ^