Compilare: main.cpp: In function 'void dijkstra(int, int)': main.cpp:60:43: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d ", lant1.size() + lant2.size()); ^ main.cpp:62:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < lant2.size() ; ++i) printf("%d ", lant2[i]); ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nolife.in", "r", stdin); ^ main.cpp:80:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nolife.out", "w", stdout); ^ main.cpp:82:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:85:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^ main.cpp:91:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:93:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^