Compilare: main.cpp: In function 'int main()': main.cpp:128:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < dist.size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp:119:15: warning: unused variable 'start' [-Wunused-variable] int n, m, start; ^~~~~ main.cpp:120:31: 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:124:49: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &from, &to, &cost); ^