Compilare: main.cpp: In function 'int main()': main.cpp:69:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < strlen(cuv); j++) ~~^~~~~~~~~~~~~ main.cpp:72:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < strlen(cuv); j++) ~~^~~~~~~~~~~~~ main.cpp:79:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < strlen(cuv); j++) ~~^~~~~~~~~~~~~ main.cpp:59:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sub.in", "r", stdin); ^ main.cpp:60:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sub.out", "w", stdout); ^ main.cpp:65:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &na); ^ main.cpp:67:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", cuv); ^ main.cpp:76:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &nb); ^ main.cpp:78:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", cuv); ^