Compilare: user.cpp: In function ‘int main()’: user.cpp:121:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < events[0][i].size(); j++) ^ user.cpp:127:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < events[1][i].size(); j++) ^ user.cpp:131:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < del[i].size(); j++) ^ user.cpp:89:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d\n", &n, &m); ^ user.cpp:95:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &x, &y, &y2); ^ user.cpp:109:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &x, &y, &(pct.r)); ^