Compilare: main.cpp: In function 'int main()': main.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p < vecp[i].size()) { ~~^~~~~~~~~~~~~~~~ main.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < vec[i].size(); j++) { ~~^~~~~~~~~~~~~~~ main.cpp:72:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < vec[i].size(); j++) { ~~^~~~~~~~~~~~~~~ main.cpp:73:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p < vec[i + 1].size() && ((vec[i][j].st <= vec[i + 1][p].st && vec[i + 1][p].st <= vec[i][j].dr) || (vec[i][j].st <= vec[i + 1][p].dr && vec[i + 1][p].dr <= vec[i][j].dr))) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:25:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tradare.in", "r", stdin); ^ main.cpp:26:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tradare.out", "w", stdout); ^ main.cpp:27:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ main.cpp:31:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ main.cpp:39:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^