Compilare: main.cpp: In function 'int main()': main.cpp:9:20: warning: integer overflow in expression [-Woverflow] #define INF (1<<31)-1 ~~~~~~~^~ main.cpp:117:27: note: in expansion of macro 'INF' a[i].cost=INF; ^~~ main.cpp:105:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &c, &n, &m); ^ main.cpp:113:45: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%s", &x, &y, s); ^ main.cpp:139:45: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%s", &x, &y, s); ^ main.cpp:171:45: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%s", &x, &y, s); ^