Compilare: main.cpp: In function 'int main()': main.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = 0; k < lists[j].size(); k++) ~~^~~~~~~~~~~~~~~~~ main.cpp:20:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ main.cpp:24:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &m, &s); ^ main.cpp:26:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &minDist[j]); ^ main.cpp:31:46: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &l, &r, &w); ^